Download DUET (Delhi University Entrance Test conducted by the NTA) 2018 DU PhD in Chemistry Question Paper With Solution Key
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
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DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
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DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
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DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
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3)
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DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
37)
38)
4. 3 [Option ID = 2753]
Correct Answer :-
1 [Option ID = 2755]
[Question ID = 718]
1. C) [Option ID = 2871]
2. B) [Option ID = 2870]
3. A) [Option ID = 2869]
4. D) both (B) and (C) [Option ID = 2872]
Correct Answer :-
A) [Option ID = 2869]
[Question ID = 709]
1. [Option ID = 2836]
2. [Option ID = 2833]
3. [Option ID = 2835]
4. [Option ID = 2834]
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
37)
38)
4. 3 [Option ID = 2753]
Correct Answer :-
1 [Option ID = 2755]
[Question ID = 718]
1. C) [Option ID = 2871]
2. B) [Option ID = 2870]
3. A) [Option ID = 2869]
4. D) both (B) and (C) [Option ID = 2872]
Correct Answer :-
A) [Option ID = 2869]
[Question ID = 709]
1. [Option ID = 2836]
2. [Option ID = 2833]
3. [Option ID = 2835]
4. [Option ID = 2834]
39)
40)
41)
42)
Correct Answer :-
[Option ID = 2836]
[Question ID = 705]
1. (2Z, 4Z)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2819]
2. (2E, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2817]
3. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2818]
4. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
Correct Answer :-
(2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
[Question ID = 680]
1. The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
2. Metal-EDTA complexes have an equilibrium concentration independent of pH [Option ID = 2718]
3. Metal-EDTA complexes are often 2:1 in stoichiometry [Option ID = 2717]
4. Metal-EDTA complexes are less stable than the corresponding metal-ammine complexes [Option ID = 2720]
Correct Answer :-
The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
[Question ID = 671]
1. 150 g [Option ID = 2682]
2. 300 g [Option ID = 2684]
3. 120 g [Option ID = 2681]
4. 180 g [Option ID = 2683]
Correct Answer :-
300 g [Option ID = 2684]
[Question ID = 756]
1. [Option ID = 3021]
2. [Option ID = 3022]
3. [Option ID = 3024]
4. [Option ID = 3023]
Correct Answer :-
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
37)
38)
4. 3 [Option ID = 2753]
Correct Answer :-
1 [Option ID = 2755]
[Question ID = 718]
1. C) [Option ID = 2871]
2. B) [Option ID = 2870]
3. A) [Option ID = 2869]
4. D) both (B) and (C) [Option ID = 2872]
Correct Answer :-
A) [Option ID = 2869]
[Question ID = 709]
1. [Option ID = 2836]
2. [Option ID = 2833]
3. [Option ID = 2835]
4. [Option ID = 2834]
39)
40)
41)
42)
Correct Answer :-
[Option ID = 2836]
[Question ID = 705]
1. (2Z, 4Z)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2819]
2. (2E, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2817]
3. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2818]
4. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
Correct Answer :-
(2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
[Question ID = 680]
1. The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
2. Metal-EDTA complexes have an equilibrium concentration independent of pH [Option ID = 2718]
3. Metal-EDTA complexes are often 2:1 in stoichiometry [Option ID = 2717]
4. Metal-EDTA complexes are less stable than the corresponding metal-ammine complexes [Option ID = 2720]
Correct Answer :-
The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
[Question ID = 671]
1. 150 g [Option ID = 2682]
2. 300 g [Option ID = 2684]
3. 120 g [Option ID = 2681]
4. 180 g [Option ID = 2683]
Correct Answer :-
300 g [Option ID = 2684]
[Question ID = 756]
1. [Option ID = 3021]
2. [Option ID = 3022]
3. [Option ID = 3024]
4. [Option ID = 3023]
Correct Answer :-
43)
44)
45)
[Option ID = 3024]
[Question ID = 750]
1. [Option ID = 2999]
2. [Option ID = 3000]
3. [Option ID = 2997]
4. [Option ID = 2998]
Correct Answer :-
[Option ID = 2997]
[Question ID = 715]
1. [Option ID = 2857]
2. [Option ID = 2860]
3. [Option ID = 2858]
4. [Option ID = 2859]
Correct Answer :-
[Option ID = 2860]
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
37)
38)
4. 3 [Option ID = 2753]
Correct Answer :-
1 [Option ID = 2755]
[Question ID = 718]
1. C) [Option ID = 2871]
2. B) [Option ID = 2870]
3. A) [Option ID = 2869]
4. D) both (B) and (C) [Option ID = 2872]
Correct Answer :-
A) [Option ID = 2869]
[Question ID = 709]
1. [Option ID = 2836]
2. [Option ID = 2833]
3. [Option ID = 2835]
4. [Option ID = 2834]
39)
40)
41)
42)
Correct Answer :-
[Option ID = 2836]
[Question ID = 705]
1. (2Z, 4Z)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2819]
2. (2E, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2817]
3. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2818]
4. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
Correct Answer :-
(2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
[Question ID = 680]
1. The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
2. Metal-EDTA complexes have an equilibrium concentration independent of pH [Option ID = 2718]
3. Metal-EDTA complexes are often 2:1 in stoichiometry [Option ID = 2717]
4. Metal-EDTA complexes are less stable than the corresponding metal-ammine complexes [Option ID = 2720]
Correct Answer :-
The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
[Question ID = 671]
1. 150 g [Option ID = 2682]
2. 300 g [Option ID = 2684]
3. 120 g [Option ID = 2681]
4. 180 g [Option ID = 2683]
Correct Answer :-
300 g [Option ID = 2684]
[Question ID = 756]
1. [Option ID = 3021]
2. [Option ID = 3022]
3. [Option ID = 3024]
4. [Option ID = 3023]
Correct Answer :-
43)
44)
45)
[Option ID = 3024]
[Question ID = 750]
1. [Option ID = 2999]
2. [Option ID = 3000]
3. [Option ID = 2997]
4. [Option ID = 2998]
Correct Answer :-
[Option ID = 2997]
[Question ID = 715]
1. [Option ID = 2857]
2. [Option ID = 2860]
3. [Option ID = 2858]
4. [Option ID = 2859]
Correct Answer :-
[Option ID = 2860]
46)
47)
[Question ID = 719]
1. [Option ID = 2873]
2. [Option ID = 2876]
3. [Option ID = 2874]
4. [Option ID = 2875]
Correct Answer :-
[Question ID = 674]
1. Evaporating some water to decrease the volume of the solution. [Option ID = 2696]
2. [Option ID = 2695]
3. [Option ID = 2694]
4. [Option ID = 2693]
Correct Answer :-
[Option ID = 2693]
[Question ID = 728]
1. [Option ID = 2910]
2. [Option ID = 2911]
3. [Option ID = 2909]
4. [Option ID = 2912]
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4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
37)
38)
4. 3 [Option ID = 2753]
Correct Answer :-
1 [Option ID = 2755]
[Question ID = 718]
1. C) [Option ID = 2871]
2. B) [Option ID = 2870]
3. A) [Option ID = 2869]
4. D) both (B) and (C) [Option ID = 2872]
Correct Answer :-
A) [Option ID = 2869]
[Question ID = 709]
1. [Option ID = 2836]
2. [Option ID = 2833]
3. [Option ID = 2835]
4. [Option ID = 2834]
39)
40)
41)
42)
Correct Answer :-
[Option ID = 2836]
[Question ID = 705]
1. (2Z, 4Z)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2819]
2. (2E, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2817]
3. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2818]
4. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
Correct Answer :-
(2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
[Question ID = 680]
1. The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
2. Metal-EDTA complexes have an equilibrium concentration independent of pH [Option ID = 2718]
3. Metal-EDTA complexes are often 2:1 in stoichiometry [Option ID = 2717]
4. Metal-EDTA complexes are less stable than the corresponding metal-ammine complexes [Option ID = 2720]
Correct Answer :-
The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
[Question ID = 671]
1. 150 g [Option ID = 2682]
2. 300 g [Option ID = 2684]
3. 120 g [Option ID = 2681]
4. 180 g [Option ID = 2683]
Correct Answer :-
300 g [Option ID = 2684]
[Question ID = 756]
1. [Option ID = 3021]
2. [Option ID = 3022]
3. [Option ID = 3024]
4. [Option ID = 3023]
Correct Answer :-
43)
44)
45)
[Option ID = 3024]
[Question ID = 750]
1. [Option ID = 2999]
2. [Option ID = 3000]
3. [Option ID = 2997]
4. [Option ID = 2998]
Correct Answer :-
[Option ID = 2997]
[Question ID = 715]
1. [Option ID = 2857]
2. [Option ID = 2860]
3. [Option ID = 2858]
4. [Option ID = 2859]
Correct Answer :-
[Option ID = 2860]
46)
47)
[Question ID = 719]
1. [Option ID = 2873]
2. [Option ID = 2876]
3. [Option ID = 2874]
4. [Option ID = 2875]
Correct Answer :-
[Question ID = 674]
1. Evaporating some water to decrease the volume of the solution. [Option ID = 2696]
2. [Option ID = 2695]
3. [Option ID = 2694]
4. [Option ID = 2693]
Correct Answer :-
[Option ID = 2693]
[Question ID = 728]
1. [Option ID = 2910]
2. [Option ID = 2911]
3. [Option ID = 2909]
4. [Option ID = 2912]
48)
49)
50)
51)
Correct Answer :-
[Option ID = 2912]
[Question ID = 697]
1. III only [Option ID = 2788]
2. II only [Option ID = 2787]
3. I only [Option ID = 2785]
4. I, II and III [Option ID = 2786]
Correct Answer :-
I, II and III [Option ID = 2786]
[Question ID = 700]
1. [Option ID = 2798]
2. [Option ID = 2797]
3. [Option ID = 2800]
4. [Option ID = 2799]
Correct Answer :-
[Option ID = 2799]
[Question ID = 678]
1. Cr
2+
has a low cationic charge [Option ID = 2711]
2. F has -1 anionic charge and highly electronegative [Option ID = 2709]
3. Spin-orbit coupling in Cr
2+
[Option ID = 2712]
4. The Jahn-Teller effect [Option ID = 2710]
Correct Answer :-
The Jahn-Teller effect [Option ID = 2710]
[Question ID = 723]
1. [Option ID = 2889]
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
37)
38)
4. 3 [Option ID = 2753]
Correct Answer :-
1 [Option ID = 2755]
[Question ID = 718]
1. C) [Option ID = 2871]
2. B) [Option ID = 2870]
3. A) [Option ID = 2869]
4. D) both (B) and (C) [Option ID = 2872]
Correct Answer :-
A) [Option ID = 2869]
[Question ID = 709]
1. [Option ID = 2836]
2. [Option ID = 2833]
3. [Option ID = 2835]
4. [Option ID = 2834]
39)
40)
41)
42)
Correct Answer :-
[Option ID = 2836]
[Question ID = 705]
1. (2Z, 4Z)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2819]
2. (2E, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2817]
3. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2818]
4. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
Correct Answer :-
(2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
[Question ID = 680]
1. The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
2. Metal-EDTA complexes have an equilibrium concentration independent of pH [Option ID = 2718]
3. Metal-EDTA complexes are often 2:1 in stoichiometry [Option ID = 2717]
4. Metal-EDTA complexes are less stable than the corresponding metal-ammine complexes [Option ID = 2720]
Correct Answer :-
The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
[Question ID = 671]
1. 150 g [Option ID = 2682]
2. 300 g [Option ID = 2684]
3. 120 g [Option ID = 2681]
4. 180 g [Option ID = 2683]
Correct Answer :-
300 g [Option ID = 2684]
[Question ID = 756]
1. [Option ID = 3021]
2. [Option ID = 3022]
3. [Option ID = 3024]
4. [Option ID = 3023]
Correct Answer :-
43)
44)
45)
[Option ID = 3024]
[Question ID = 750]
1. [Option ID = 2999]
2. [Option ID = 3000]
3. [Option ID = 2997]
4. [Option ID = 2998]
Correct Answer :-
[Option ID = 2997]
[Question ID = 715]
1. [Option ID = 2857]
2. [Option ID = 2860]
3. [Option ID = 2858]
4. [Option ID = 2859]
Correct Answer :-
[Option ID = 2860]
46)
47)
[Question ID = 719]
1. [Option ID = 2873]
2. [Option ID = 2876]
3. [Option ID = 2874]
4. [Option ID = 2875]
Correct Answer :-
[Question ID = 674]
1. Evaporating some water to decrease the volume of the solution. [Option ID = 2696]
2. [Option ID = 2695]
3. [Option ID = 2694]
4. [Option ID = 2693]
Correct Answer :-
[Option ID = 2693]
[Question ID = 728]
1. [Option ID = 2910]
2. [Option ID = 2911]
3. [Option ID = 2909]
4. [Option ID = 2912]
48)
49)
50)
51)
Correct Answer :-
[Option ID = 2912]
[Question ID = 697]
1. III only [Option ID = 2788]
2. II only [Option ID = 2787]
3. I only [Option ID = 2785]
4. I, II and III [Option ID = 2786]
Correct Answer :-
I, II and III [Option ID = 2786]
[Question ID = 700]
1. [Option ID = 2798]
2. [Option ID = 2797]
3. [Option ID = 2800]
4. [Option ID = 2799]
Correct Answer :-
[Option ID = 2799]
[Question ID = 678]
1. Cr
2+
has a low cationic charge [Option ID = 2711]
2. F has -1 anionic charge and highly electronegative [Option ID = 2709]
3. Spin-orbit coupling in Cr
2+
[Option ID = 2712]
4. The Jahn-Teller effect [Option ID = 2710]
Correct Answer :-
The Jahn-Teller effect [Option ID = 2710]
[Question ID = 723]
1. [Option ID = 2889]
52)
53)
2. [Option ID = 2890]
3. [Option ID = 2891]
4. [Option ID = 2892]
Correct Answer :-
[Option ID = 2889]
[Question ID = 727]
1. [Option ID = 2907]
2. [Option ID = 2906]
3. [Option ID = 2905]
4. [Option ID = 2908]
Correct Answer :-
[Option ID = 2905]
[Question ID = 707]
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
37)
38)
4. 3 [Option ID = 2753]
Correct Answer :-
1 [Option ID = 2755]
[Question ID = 718]
1. C) [Option ID = 2871]
2. B) [Option ID = 2870]
3. A) [Option ID = 2869]
4. D) both (B) and (C) [Option ID = 2872]
Correct Answer :-
A) [Option ID = 2869]
[Question ID = 709]
1. [Option ID = 2836]
2. [Option ID = 2833]
3. [Option ID = 2835]
4. [Option ID = 2834]
39)
40)
41)
42)
Correct Answer :-
[Option ID = 2836]
[Question ID = 705]
1. (2Z, 4Z)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2819]
2. (2E, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2817]
3. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2818]
4. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
Correct Answer :-
(2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
[Question ID = 680]
1. The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
2. Metal-EDTA complexes have an equilibrium concentration independent of pH [Option ID = 2718]
3. Metal-EDTA complexes are often 2:1 in stoichiometry [Option ID = 2717]
4. Metal-EDTA complexes are less stable than the corresponding metal-ammine complexes [Option ID = 2720]
Correct Answer :-
The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
[Question ID = 671]
1. 150 g [Option ID = 2682]
2. 300 g [Option ID = 2684]
3. 120 g [Option ID = 2681]
4. 180 g [Option ID = 2683]
Correct Answer :-
300 g [Option ID = 2684]
[Question ID = 756]
1. [Option ID = 3021]
2. [Option ID = 3022]
3. [Option ID = 3024]
4. [Option ID = 3023]
Correct Answer :-
43)
44)
45)
[Option ID = 3024]
[Question ID = 750]
1. [Option ID = 2999]
2. [Option ID = 3000]
3. [Option ID = 2997]
4. [Option ID = 2998]
Correct Answer :-
[Option ID = 2997]
[Question ID = 715]
1. [Option ID = 2857]
2. [Option ID = 2860]
3. [Option ID = 2858]
4. [Option ID = 2859]
Correct Answer :-
[Option ID = 2860]
46)
47)
[Question ID = 719]
1. [Option ID = 2873]
2. [Option ID = 2876]
3. [Option ID = 2874]
4. [Option ID = 2875]
Correct Answer :-
[Question ID = 674]
1. Evaporating some water to decrease the volume of the solution. [Option ID = 2696]
2. [Option ID = 2695]
3. [Option ID = 2694]
4. [Option ID = 2693]
Correct Answer :-
[Option ID = 2693]
[Question ID = 728]
1. [Option ID = 2910]
2. [Option ID = 2911]
3. [Option ID = 2909]
4. [Option ID = 2912]
48)
49)
50)
51)
Correct Answer :-
[Option ID = 2912]
[Question ID = 697]
1. III only [Option ID = 2788]
2. II only [Option ID = 2787]
3. I only [Option ID = 2785]
4. I, II and III [Option ID = 2786]
Correct Answer :-
I, II and III [Option ID = 2786]
[Question ID = 700]
1. [Option ID = 2798]
2. [Option ID = 2797]
3. [Option ID = 2800]
4. [Option ID = 2799]
Correct Answer :-
[Option ID = 2799]
[Question ID = 678]
1. Cr
2+
has a low cationic charge [Option ID = 2711]
2. F has -1 anionic charge and highly electronegative [Option ID = 2709]
3. Spin-orbit coupling in Cr
2+
[Option ID = 2712]
4. The Jahn-Teller effect [Option ID = 2710]
Correct Answer :-
The Jahn-Teller effect [Option ID = 2710]
[Question ID = 723]
1. [Option ID = 2889]
52)
53)
2. [Option ID = 2890]
3. [Option ID = 2891]
4. [Option ID = 2892]
Correct Answer :-
[Option ID = 2889]
[Question ID = 727]
1. [Option ID = 2907]
2. [Option ID = 2906]
3. [Option ID = 2905]
4. [Option ID = 2908]
Correct Answer :-
[Option ID = 2905]
[Question ID = 707]
54)
55)
56)
1. N9 [Option ID = 2828]
2. N7 [Option ID = 2827]
3. N1 [Option ID = 2825]
4. N3 [Option ID = 2826]
Correct Answer :-
N7 [Option ID = 2827]
[Question ID = 672]
1. Bicapped prism [Option ID = 2688]
2. Square pyramidal [Option ID = 2686]
3. Trigonal planar [Option ID = 2685]
4. Bent [Option ID = 2687]
Correct Answer :-
Square pyramidal [Option ID = 2686]
[Question ID = 704]
1. [Option ID = 2816]
2. [Option ID = 2814]
3. [Option ID = 2813]
4. [Option ID = 2815]
Correct Answer :-
[Option ID = 2813]
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
37)
38)
4. 3 [Option ID = 2753]
Correct Answer :-
1 [Option ID = 2755]
[Question ID = 718]
1. C) [Option ID = 2871]
2. B) [Option ID = 2870]
3. A) [Option ID = 2869]
4. D) both (B) and (C) [Option ID = 2872]
Correct Answer :-
A) [Option ID = 2869]
[Question ID = 709]
1. [Option ID = 2836]
2. [Option ID = 2833]
3. [Option ID = 2835]
4. [Option ID = 2834]
39)
40)
41)
42)
Correct Answer :-
[Option ID = 2836]
[Question ID = 705]
1. (2Z, 4Z)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2819]
2. (2E, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2817]
3. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2818]
4. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
Correct Answer :-
(2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
[Question ID = 680]
1. The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
2. Metal-EDTA complexes have an equilibrium concentration independent of pH [Option ID = 2718]
3. Metal-EDTA complexes are often 2:1 in stoichiometry [Option ID = 2717]
4. Metal-EDTA complexes are less stable than the corresponding metal-ammine complexes [Option ID = 2720]
Correct Answer :-
The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
[Question ID = 671]
1. 150 g [Option ID = 2682]
2. 300 g [Option ID = 2684]
3. 120 g [Option ID = 2681]
4. 180 g [Option ID = 2683]
Correct Answer :-
300 g [Option ID = 2684]
[Question ID = 756]
1. [Option ID = 3021]
2. [Option ID = 3022]
3. [Option ID = 3024]
4. [Option ID = 3023]
Correct Answer :-
43)
44)
45)
[Option ID = 3024]
[Question ID = 750]
1. [Option ID = 2999]
2. [Option ID = 3000]
3. [Option ID = 2997]
4. [Option ID = 2998]
Correct Answer :-
[Option ID = 2997]
[Question ID = 715]
1. [Option ID = 2857]
2. [Option ID = 2860]
3. [Option ID = 2858]
4. [Option ID = 2859]
Correct Answer :-
[Option ID = 2860]
46)
47)
[Question ID = 719]
1. [Option ID = 2873]
2. [Option ID = 2876]
3. [Option ID = 2874]
4. [Option ID = 2875]
Correct Answer :-
[Question ID = 674]
1. Evaporating some water to decrease the volume of the solution. [Option ID = 2696]
2. [Option ID = 2695]
3. [Option ID = 2694]
4. [Option ID = 2693]
Correct Answer :-
[Option ID = 2693]
[Question ID = 728]
1. [Option ID = 2910]
2. [Option ID = 2911]
3. [Option ID = 2909]
4. [Option ID = 2912]
48)
49)
50)
51)
Correct Answer :-
[Option ID = 2912]
[Question ID = 697]
1. III only [Option ID = 2788]
2. II only [Option ID = 2787]
3. I only [Option ID = 2785]
4. I, II and III [Option ID = 2786]
Correct Answer :-
I, II and III [Option ID = 2786]
[Question ID = 700]
1. [Option ID = 2798]
2. [Option ID = 2797]
3. [Option ID = 2800]
4. [Option ID = 2799]
Correct Answer :-
[Option ID = 2799]
[Question ID = 678]
1. Cr
2+
has a low cationic charge [Option ID = 2711]
2. F has -1 anionic charge and highly electronegative [Option ID = 2709]
3. Spin-orbit coupling in Cr
2+
[Option ID = 2712]
4. The Jahn-Teller effect [Option ID = 2710]
Correct Answer :-
The Jahn-Teller effect [Option ID = 2710]
[Question ID = 723]
1. [Option ID = 2889]
52)
53)
2. [Option ID = 2890]
3. [Option ID = 2891]
4. [Option ID = 2892]
Correct Answer :-
[Option ID = 2889]
[Question ID = 727]
1. [Option ID = 2907]
2. [Option ID = 2906]
3. [Option ID = 2905]
4. [Option ID = 2908]
Correct Answer :-
[Option ID = 2905]
[Question ID = 707]
54)
55)
56)
1. N9 [Option ID = 2828]
2. N7 [Option ID = 2827]
3. N1 [Option ID = 2825]
4. N3 [Option ID = 2826]
Correct Answer :-
N7 [Option ID = 2827]
[Question ID = 672]
1. Bicapped prism [Option ID = 2688]
2. Square pyramidal [Option ID = 2686]
3. Trigonal planar [Option ID = 2685]
4. Bent [Option ID = 2687]
Correct Answer :-
Square pyramidal [Option ID = 2686]
[Question ID = 704]
1. [Option ID = 2816]
2. [Option ID = 2814]
3. [Option ID = 2813]
4. [Option ID = 2815]
Correct Answer :-
[Option ID = 2813]
57)
58)
[Question ID = 708]
1. [Option ID = 2829]
2. [Option ID = 2832]
3. [Option ID = 2831]
4. [Option ID = 2830]
Correct Answer :-
[Option ID = 2831]
[Question ID = 717]
1. [Option ID = 2866]
2. [Option ID = 2865]
3. [Option ID = 2867]
4. [Option ID = 2868]
Correct Answer :-
[Option ID = 2866]
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
37)
38)
4. 3 [Option ID = 2753]
Correct Answer :-
1 [Option ID = 2755]
[Question ID = 718]
1. C) [Option ID = 2871]
2. B) [Option ID = 2870]
3. A) [Option ID = 2869]
4. D) both (B) and (C) [Option ID = 2872]
Correct Answer :-
A) [Option ID = 2869]
[Question ID = 709]
1. [Option ID = 2836]
2. [Option ID = 2833]
3. [Option ID = 2835]
4. [Option ID = 2834]
39)
40)
41)
42)
Correct Answer :-
[Option ID = 2836]
[Question ID = 705]
1. (2Z, 4Z)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2819]
2. (2E, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2817]
3. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2818]
4. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
Correct Answer :-
(2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
[Question ID = 680]
1. The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
2. Metal-EDTA complexes have an equilibrium concentration independent of pH [Option ID = 2718]
3. Metal-EDTA complexes are often 2:1 in stoichiometry [Option ID = 2717]
4. Metal-EDTA complexes are less stable than the corresponding metal-ammine complexes [Option ID = 2720]
Correct Answer :-
The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
[Question ID = 671]
1. 150 g [Option ID = 2682]
2. 300 g [Option ID = 2684]
3. 120 g [Option ID = 2681]
4. 180 g [Option ID = 2683]
Correct Answer :-
300 g [Option ID = 2684]
[Question ID = 756]
1. [Option ID = 3021]
2. [Option ID = 3022]
3. [Option ID = 3024]
4. [Option ID = 3023]
Correct Answer :-
43)
44)
45)
[Option ID = 3024]
[Question ID = 750]
1. [Option ID = 2999]
2. [Option ID = 3000]
3. [Option ID = 2997]
4. [Option ID = 2998]
Correct Answer :-
[Option ID = 2997]
[Question ID = 715]
1. [Option ID = 2857]
2. [Option ID = 2860]
3. [Option ID = 2858]
4. [Option ID = 2859]
Correct Answer :-
[Option ID = 2860]
46)
47)
[Question ID = 719]
1. [Option ID = 2873]
2. [Option ID = 2876]
3. [Option ID = 2874]
4. [Option ID = 2875]
Correct Answer :-
[Question ID = 674]
1. Evaporating some water to decrease the volume of the solution. [Option ID = 2696]
2. [Option ID = 2695]
3. [Option ID = 2694]
4. [Option ID = 2693]
Correct Answer :-
[Option ID = 2693]
[Question ID = 728]
1. [Option ID = 2910]
2. [Option ID = 2911]
3. [Option ID = 2909]
4. [Option ID = 2912]
48)
49)
50)
51)
Correct Answer :-
[Option ID = 2912]
[Question ID = 697]
1. III only [Option ID = 2788]
2. II only [Option ID = 2787]
3. I only [Option ID = 2785]
4. I, II and III [Option ID = 2786]
Correct Answer :-
I, II and III [Option ID = 2786]
[Question ID = 700]
1. [Option ID = 2798]
2. [Option ID = 2797]
3. [Option ID = 2800]
4. [Option ID = 2799]
Correct Answer :-
[Option ID = 2799]
[Question ID = 678]
1. Cr
2+
has a low cationic charge [Option ID = 2711]
2. F has -1 anionic charge and highly electronegative [Option ID = 2709]
3. Spin-orbit coupling in Cr
2+
[Option ID = 2712]
4. The Jahn-Teller effect [Option ID = 2710]
Correct Answer :-
The Jahn-Teller effect [Option ID = 2710]
[Question ID = 723]
1. [Option ID = 2889]
52)
53)
2. [Option ID = 2890]
3. [Option ID = 2891]
4. [Option ID = 2892]
Correct Answer :-
[Option ID = 2889]
[Question ID = 727]
1. [Option ID = 2907]
2. [Option ID = 2906]
3. [Option ID = 2905]
4. [Option ID = 2908]
Correct Answer :-
[Option ID = 2905]
[Question ID = 707]
54)
55)
56)
1. N9 [Option ID = 2828]
2. N7 [Option ID = 2827]
3. N1 [Option ID = 2825]
4. N3 [Option ID = 2826]
Correct Answer :-
N7 [Option ID = 2827]
[Question ID = 672]
1. Bicapped prism [Option ID = 2688]
2. Square pyramidal [Option ID = 2686]
3. Trigonal planar [Option ID = 2685]
4. Bent [Option ID = 2687]
Correct Answer :-
Square pyramidal [Option ID = 2686]
[Question ID = 704]
1. [Option ID = 2816]
2. [Option ID = 2814]
3. [Option ID = 2813]
4. [Option ID = 2815]
Correct Answer :-
[Option ID = 2813]
57)
58)
[Question ID = 708]
1. [Option ID = 2829]
2. [Option ID = 2832]
3. [Option ID = 2831]
4. [Option ID = 2830]
Correct Answer :-
[Option ID = 2831]
[Question ID = 717]
1. [Option ID = 2866]
2. [Option ID = 2865]
3. [Option ID = 2867]
4. [Option ID = 2868]
Correct Answer :-
[Option ID = 2866]
59)
[Question ID = 711]
1. [Option ID = 2843]
2. [Option ID = 2842]
3. [Option ID = 2844]
4. [Option ID = 2841]
Correct Answer :-
[Option ID = 2842]
[Question ID = 710]
1. [Option ID = 2838]
2. [Option ID = 2839]
3. [Option ID = 2837]
4. [Option ID = 2840]
Correct Answer :-
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
37)
38)
4. 3 [Option ID = 2753]
Correct Answer :-
1 [Option ID = 2755]
[Question ID = 718]
1. C) [Option ID = 2871]
2. B) [Option ID = 2870]
3. A) [Option ID = 2869]
4. D) both (B) and (C) [Option ID = 2872]
Correct Answer :-
A) [Option ID = 2869]
[Question ID = 709]
1. [Option ID = 2836]
2. [Option ID = 2833]
3. [Option ID = 2835]
4. [Option ID = 2834]
39)
40)
41)
42)
Correct Answer :-
[Option ID = 2836]
[Question ID = 705]
1. (2Z, 4Z)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2819]
2. (2E, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2817]
3. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2818]
4. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
Correct Answer :-
(2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
[Question ID = 680]
1. The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
2. Metal-EDTA complexes have an equilibrium concentration independent of pH [Option ID = 2718]
3. Metal-EDTA complexes are often 2:1 in stoichiometry [Option ID = 2717]
4. Metal-EDTA complexes are less stable than the corresponding metal-ammine complexes [Option ID = 2720]
Correct Answer :-
The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
[Question ID = 671]
1. 150 g [Option ID = 2682]
2. 300 g [Option ID = 2684]
3. 120 g [Option ID = 2681]
4. 180 g [Option ID = 2683]
Correct Answer :-
300 g [Option ID = 2684]
[Question ID = 756]
1. [Option ID = 3021]
2. [Option ID = 3022]
3. [Option ID = 3024]
4. [Option ID = 3023]
Correct Answer :-
43)
44)
45)
[Option ID = 3024]
[Question ID = 750]
1. [Option ID = 2999]
2. [Option ID = 3000]
3. [Option ID = 2997]
4. [Option ID = 2998]
Correct Answer :-
[Option ID = 2997]
[Question ID = 715]
1. [Option ID = 2857]
2. [Option ID = 2860]
3. [Option ID = 2858]
4. [Option ID = 2859]
Correct Answer :-
[Option ID = 2860]
46)
47)
[Question ID = 719]
1. [Option ID = 2873]
2. [Option ID = 2876]
3. [Option ID = 2874]
4. [Option ID = 2875]
Correct Answer :-
[Question ID = 674]
1. Evaporating some water to decrease the volume of the solution. [Option ID = 2696]
2. [Option ID = 2695]
3. [Option ID = 2694]
4. [Option ID = 2693]
Correct Answer :-
[Option ID = 2693]
[Question ID = 728]
1. [Option ID = 2910]
2. [Option ID = 2911]
3. [Option ID = 2909]
4. [Option ID = 2912]
48)
49)
50)
51)
Correct Answer :-
[Option ID = 2912]
[Question ID = 697]
1. III only [Option ID = 2788]
2. II only [Option ID = 2787]
3. I only [Option ID = 2785]
4. I, II and III [Option ID = 2786]
Correct Answer :-
I, II and III [Option ID = 2786]
[Question ID = 700]
1. [Option ID = 2798]
2. [Option ID = 2797]
3. [Option ID = 2800]
4. [Option ID = 2799]
Correct Answer :-
[Option ID = 2799]
[Question ID = 678]
1. Cr
2+
has a low cationic charge [Option ID = 2711]
2. F has -1 anionic charge and highly electronegative [Option ID = 2709]
3. Spin-orbit coupling in Cr
2+
[Option ID = 2712]
4. The Jahn-Teller effect [Option ID = 2710]
Correct Answer :-
The Jahn-Teller effect [Option ID = 2710]
[Question ID = 723]
1. [Option ID = 2889]
52)
53)
2. [Option ID = 2890]
3. [Option ID = 2891]
4. [Option ID = 2892]
Correct Answer :-
[Option ID = 2889]
[Question ID = 727]
1. [Option ID = 2907]
2. [Option ID = 2906]
3. [Option ID = 2905]
4. [Option ID = 2908]
Correct Answer :-
[Option ID = 2905]
[Question ID = 707]
54)
55)
56)
1. N9 [Option ID = 2828]
2. N7 [Option ID = 2827]
3. N1 [Option ID = 2825]
4. N3 [Option ID = 2826]
Correct Answer :-
N7 [Option ID = 2827]
[Question ID = 672]
1. Bicapped prism [Option ID = 2688]
2. Square pyramidal [Option ID = 2686]
3. Trigonal planar [Option ID = 2685]
4. Bent [Option ID = 2687]
Correct Answer :-
Square pyramidal [Option ID = 2686]
[Question ID = 704]
1. [Option ID = 2816]
2. [Option ID = 2814]
3. [Option ID = 2813]
4. [Option ID = 2815]
Correct Answer :-
[Option ID = 2813]
57)
58)
[Question ID = 708]
1. [Option ID = 2829]
2. [Option ID = 2832]
3. [Option ID = 2831]
4. [Option ID = 2830]
Correct Answer :-
[Option ID = 2831]
[Question ID = 717]
1. [Option ID = 2866]
2. [Option ID = 2865]
3. [Option ID = 2867]
4. [Option ID = 2868]
Correct Answer :-
[Option ID = 2866]
59)
[Question ID = 711]
1. [Option ID = 2843]
2. [Option ID = 2842]
3. [Option ID = 2844]
4. [Option ID = 2841]
Correct Answer :-
[Option ID = 2842]
[Question ID = 710]
1. [Option ID = 2838]
2. [Option ID = 2839]
3. [Option ID = 2837]
4. [Option ID = 2840]
Correct Answer :-
60)
61)
62)
[Option ID = 2838]
[Question ID = 682]
1. 0.30 M [Option ID = 2728]
2. 0.25 M [Option ID = 2727]
3. 0.60 M [Option ID = 2725]
4. 0.10 M [Option ID = 2726]
Correct Answer :-
0.30 M [Option ID = 2728]
[Question ID = 772]
1. [Option ID = 3087]
2. [Option ID = 3088]
3. [Option ID = 3086]
4. [Option ID = 3085]
Correct Answer :-
[Option ID = 3086]
[Question ID = 733]
1. [Option ID = 2932]
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
37)
38)
4. 3 [Option ID = 2753]
Correct Answer :-
1 [Option ID = 2755]
[Question ID = 718]
1. C) [Option ID = 2871]
2. B) [Option ID = 2870]
3. A) [Option ID = 2869]
4. D) both (B) and (C) [Option ID = 2872]
Correct Answer :-
A) [Option ID = 2869]
[Question ID = 709]
1. [Option ID = 2836]
2. [Option ID = 2833]
3. [Option ID = 2835]
4. [Option ID = 2834]
39)
40)
41)
42)
Correct Answer :-
[Option ID = 2836]
[Question ID = 705]
1. (2Z, 4Z)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2819]
2. (2E, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2817]
3. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2818]
4. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
Correct Answer :-
(2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
[Question ID = 680]
1. The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
2. Metal-EDTA complexes have an equilibrium concentration independent of pH [Option ID = 2718]
3. Metal-EDTA complexes are often 2:1 in stoichiometry [Option ID = 2717]
4. Metal-EDTA complexes are less stable than the corresponding metal-ammine complexes [Option ID = 2720]
Correct Answer :-
The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
[Question ID = 671]
1. 150 g [Option ID = 2682]
2. 300 g [Option ID = 2684]
3. 120 g [Option ID = 2681]
4. 180 g [Option ID = 2683]
Correct Answer :-
300 g [Option ID = 2684]
[Question ID = 756]
1. [Option ID = 3021]
2. [Option ID = 3022]
3. [Option ID = 3024]
4. [Option ID = 3023]
Correct Answer :-
43)
44)
45)
[Option ID = 3024]
[Question ID = 750]
1. [Option ID = 2999]
2. [Option ID = 3000]
3. [Option ID = 2997]
4. [Option ID = 2998]
Correct Answer :-
[Option ID = 2997]
[Question ID = 715]
1. [Option ID = 2857]
2. [Option ID = 2860]
3. [Option ID = 2858]
4. [Option ID = 2859]
Correct Answer :-
[Option ID = 2860]
46)
47)
[Question ID = 719]
1. [Option ID = 2873]
2. [Option ID = 2876]
3. [Option ID = 2874]
4. [Option ID = 2875]
Correct Answer :-
[Question ID = 674]
1. Evaporating some water to decrease the volume of the solution. [Option ID = 2696]
2. [Option ID = 2695]
3. [Option ID = 2694]
4. [Option ID = 2693]
Correct Answer :-
[Option ID = 2693]
[Question ID = 728]
1. [Option ID = 2910]
2. [Option ID = 2911]
3. [Option ID = 2909]
4. [Option ID = 2912]
48)
49)
50)
51)
Correct Answer :-
[Option ID = 2912]
[Question ID = 697]
1. III only [Option ID = 2788]
2. II only [Option ID = 2787]
3. I only [Option ID = 2785]
4. I, II and III [Option ID = 2786]
Correct Answer :-
I, II and III [Option ID = 2786]
[Question ID = 700]
1. [Option ID = 2798]
2. [Option ID = 2797]
3. [Option ID = 2800]
4. [Option ID = 2799]
Correct Answer :-
[Option ID = 2799]
[Question ID = 678]
1. Cr
2+
has a low cationic charge [Option ID = 2711]
2. F has -1 anionic charge and highly electronegative [Option ID = 2709]
3. Spin-orbit coupling in Cr
2+
[Option ID = 2712]
4. The Jahn-Teller effect [Option ID = 2710]
Correct Answer :-
The Jahn-Teller effect [Option ID = 2710]
[Question ID = 723]
1. [Option ID = 2889]
52)
53)
2. [Option ID = 2890]
3. [Option ID = 2891]
4. [Option ID = 2892]
Correct Answer :-
[Option ID = 2889]
[Question ID = 727]
1. [Option ID = 2907]
2. [Option ID = 2906]
3. [Option ID = 2905]
4. [Option ID = 2908]
Correct Answer :-
[Option ID = 2905]
[Question ID = 707]
54)
55)
56)
1. N9 [Option ID = 2828]
2. N7 [Option ID = 2827]
3. N1 [Option ID = 2825]
4. N3 [Option ID = 2826]
Correct Answer :-
N7 [Option ID = 2827]
[Question ID = 672]
1. Bicapped prism [Option ID = 2688]
2. Square pyramidal [Option ID = 2686]
3. Trigonal planar [Option ID = 2685]
4. Bent [Option ID = 2687]
Correct Answer :-
Square pyramidal [Option ID = 2686]
[Question ID = 704]
1. [Option ID = 2816]
2. [Option ID = 2814]
3. [Option ID = 2813]
4. [Option ID = 2815]
Correct Answer :-
[Option ID = 2813]
57)
58)
[Question ID = 708]
1. [Option ID = 2829]
2. [Option ID = 2832]
3. [Option ID = 2831]
4. [Option ID = 2830]
Correct Answer :-
[Option ID = 2831]
[Question ID = 717]
1. [Option ID = 2866]
2. [Option ID = 2865]
3. [Option ID = 2867]
4. [Option ID = 2868]
Correct Answer :-
[Option ID = 2866]
59)
[Question ID = 711]
1. [Option ID = 2843]
2. [Option ID = 2842]
3. [Option ID = 2844]
4. [Option ID = 2841]
Correct Answer :-
[Option ID = 2842]
[Question ID = 710]
1. [Option ID = 2838]
2. [Option ID = 2839]
3. [Option ID = 2837]
4. [Option ID = 2840]
Correct Answer :-
60)
61)
62)
[Option ID = 2838]
[Question ID = 682]
1. 0.30 M [Option ID = 2728]
2. 0.25 M [Option ID = 2727]
3. 0.60 M [Option ID = 2725]
4. 0.10 M [Option ID = 2726]
Correct Answer :-
0.30 M [Option ID = 2728]
[Question ID = 772]
1. [Option ID = 3087]
2. [Option ID = 3088]
3. [Option ID = 3086]
4. [Option ID = 3085]
Correct Answer :-
[Option ID = 3086]
[Question ID = 733]
1. [Option ID = 2932]
63)
64)
65)
2. [Option ID = 2929]
3. [Option ID = 2930]
4. [Option ID = 2931]
Correct Answer :-
[Option ID = 2929]
[Question ID = 767]
1. 120 [Option ID = 3065]
2. 280 [Option ID = 3066]
3. 300 [Option ID = 3068]
4. 20 [Option ID = 3067]
Correct Answer :-
20 [Option ID = 3067]
[Question ID = 734]
1. [Option ID = 2936]
2. [Option ID = 2933]
3. [Option ID = 2934]
4. [Option ID = 2935]
Correct Answer :-
[Option ID = 2935]
[Question ID = 676]
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
37)
38)
4. 3 [Option ID = 2753]
Correct Answer :-
1 [Option ID = 2755]
[Question ID = 718]
1. C) [Option ID = 2871]
2. B) [Option ID = 2870]
3. A) [Option ID = 2869]
4. D) both (B) and (C) [Option ID = 2872]
Correct Answer :-
A) [Option ID = 2869]
[Question ID = 709]
1. [Option ID = 2836]
2. [Option ID = 2833]
3. [Option ID = 2835]
4. [Option ID = 2834]
39)
40)
41)
42)
Correct Answer :-
[Option ID = 2836]
[Question ID = 705]
1. (2Z, 4Z)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2819]
2. (2E, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2817]
3. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2818]
4. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
Correct Answer :-
(2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
[Question ID = 680]
1. The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
2. Metal-EDTA complexes have an equilibrium concentration independent of pH [Option ID = 2718]
3. Metal-EDTA complexes are often 2:1 in stoichiometry [Option ID = 2717]
4. Metal-EDTA complexes are less stable than the corresponding metal-ammine complexes [Option ID = 2720]
Correct Answer :-
The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
[Question ID = 671]
1. 150 g [Option ID = 2682]
2. 300 g [Option ID = 2684]
3. 120 g [Option ID = 2681]
4. 180 g [Option ID = 2683]
Correct Answer :-
300 g [Option ID = 2684]
[Question ID = 756]
1. [Option ID = 3021]
2. [Option ID = 3022]
3. [Option ID = 3024]
4. [Option ID = 3023]
Correct Answer :-
43)
44)
45)
[Option ID = 3024]
[Question ID = 750]
1. [Option ID = 2999]
2. [Option ID = 3000]
3. [Option ID = 2997]
4. [Option ID = 2998]
Correct Answer :-
[Option ID = 2997]
[Question ID = 715]
1. [Option ID = 2857]
2. [Option ID = 2860]
3. [Option ID = 2858]
4. [Option ID = 2859]
Correct Answer :-
[Option ID = 2860]
46)
47)
[Question ID = 719]
1. [Option ID = 2873]
2. [Option ID = 2876]
3. [Option ID = 2874]
4. [Option ID = 2875]
Correct Answer :-
[Question ID = 674]
1. Evaporating some water to decrease the volume of the solution. [Option ID = 2696]
2. [Option ID = 2695]
3. [Option ID = 2694]
4. [Option ID = 2693]
Correct Answer :-
[Option ID = 2693]
[Question ID = 728]
1. [Option ID = 2910]
2. [Option ID = 2911]
3. [Option ID = 2909]
4. [Option ID = 2912]
48)
49)
50)
51)
Correct Answer :-
[Option ID = 2912]
[Question ID = 697]
1. III only [Option ID = 2788]
2. II only [Option ID = 2787]
3. I only [Option ID = 2785]
4. I, II and III [Option ID = 2786]
Correct Answer :-
I, II and III [Option ID = 2786]
[Question ID = 700]
1. [Option ID = 2798]
2. [Option ID = 2797]
3. [Option ID = 2800]
4. [Option ID = 2799]
Correct Answer :-
[Option ID = 2799]
[Question ID = 678]
1. Cr
2+
has a low cationic charge [Option ID = 2711]
2. F has -1 anionic charge and highly electronegative [Option ID = 2709]
3. Spin-orbit coupling in Cr
2+
[Option ID = 2712]
4. The Jahn-Teller effect [Option ID = 2710]
Correct Answer :-
The Jahn-Teller effect [Option ID = 2710]
[Question ID = 723]
1. [Option ID = 2889]
52)
53)
2. [Option ID = 2890]
3. [Option ID = 2891]
4. [Option ID = 2892]
Correct Answer :-
[Option ID = 2889]
[Question ID = 727]
1. [Option ID = 2907]
2. [Option ID = 2906]
3. [Option ID = 2905]
4. [Option ID = 2908]
Correct Answer :-
[Option ID = 2905]
[Question ID = 707]
54)
55)
56)
1. N9 [Option ID = 2828]
2. N7 [Option ID = 2827]
3. N1 [Option ID = 2825]
4. N3 [Option ID = 2826]
Correct Answer :-
N7 [Option ID = 2827]
[Question ID = 672]
1. Bicapped prism [Option ID = 2688]
2. Square pyramidal [Option ID = 2686]
3. Trigonal planar [Option ID = 2685]
4. Bent [Option ID = 2687]
Correct Answer :-
Square pyramidal [Option ID = 2686]
[Question ID = 704]
1. [Option ID = 2816]
2. [Option ID = 2814]
3. [Option ID = 2813]
4. [Option ID = 2815]
Correct Answer :-
[Option ID = 2813]
57)
58)
[Question ID = 708]
1. [Option ID = 2829]
2. [Option ID = 2832]
3. [Option ID = 2831]
4. [Option ID = 2830]
Correct Answer :-
[Option ID = 2831]
[Question ID = 717]
1. [Option ID = 2866]
2. [Option ID = 2865]
3. [Option ID = 2867]
4. [Option ID = 2868]
Correct Answer :-
[Option ID = 2866]
59)
[Question ID = 711]
1. [Option ID = 2843]
2. [Option ID = 2842]
3. [Option ID = 2844]
4. [Option ID = 2841]
Correct Answer :-
[Option ID = 2842]
[Question ID = 710]
1. [Option ID = 2838]
2. [Option ID = 2839]
3. [Option ID = 2837]
4. [Option ID = 2840]
Correct Answer :-
60)
61)
62)
[Option ID = 2838]
[Question ID = 682]
1. 0.30 M [Option ID = 2728]
2. 0.25 M [Option ID = 2727]
3. 0.60 M [Option ID = 2725]
4. 0.10 M [Option ID = 2726]
Correct Answer :-
0.30 M [Option ID = 2728]
[Question ID = 772]
1. [Option ID = 3087]
2. [Option ID = 3088]
3. [Option ID = 3086]
4. [Option ID = 3085]
Correct Answer :-
[Option ID = 3086]
[Question ID = 733]
1. [Option ID = 2932]
63)
64)
65)
2. [Option ID = 2929]
3. [Option ID = 2930]
4. [Option ID = 2931]
Correct Answer :-
[Option ID = 2929]
[Question ID = 767]
1. 120 [Option ID = 3065]
2. 280 [Option ID = 3066]
3. 300 [Option ID = 3068]
4. 20 [Option ID = 3067]
Correct Answer :-
20 [Option ID = 3067]
[Question ID = 734]
1. [Option ID = 2936]
2. [Option ID = 2933]
3. [Option ID = 2934]
4. [Option ID = 2935]
Correct Answer :-
[Option ID = 2935]
[Question ID = 676]
66)
67)
68)
1. [Option ID = 2702]
2. [Option ID = 2703]
3. [Option ID = 2704]
4. [Option ID = 2701]
Correct Answer :-
[Option ID = 2703]
[Question ID = 729]
1. (2Z, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2914]
2. (2E, 4E)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2915]
3. (2E, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2916]
4. (2Z, 4E)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2913]
Correct Answer :-
(2E, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2916]
[Question ID = 765]
1. [Option ID = 3060]
2. [Option ID = 3057]
3. [Option ID = 3058]
4. [Option ID = 3059]
Correct Answer :-
[Option ID = 3059]
[Question ID = 724]
1. [Option ID = 2893]
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
37)
38)
4. 3 [Option ID = 2753]
Correct Answer :-
1 [Option ID = 2755]
[Question ID = 718]
1. C) [Option ID = 2871]
2. B) [Option ID = 2870]
3. A) [Option ID = 2869]
4. D) both (B) and (C) [Option ID = 2872]
Correct Answer :-
A) [Option ID = 2869]
[Question ID = 709]
1. [Option ID = 2836]
2. [Option ID = 2833]
3. [Option ID = 2835]
4. [Option ID = 2834]
39)
40)
41)
42)
Correct Answer :-
[Option ID = 2836]
[Question ID = 705]
1. (2Z, 4Z)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2819]
2. (2E, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2817]
3. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2818]
4. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
Correct Answer :-
(2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
[Question ID = 680]
1. The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
2. Metal-EDTA complexes have an equilibrium concentration independent of pH [Option ID = 2718]
3. Metal-EDTA complexes are often 2:1 in stoichiometry [Option ID = 2717]
4. Metal-EDTA complexes are less stable than the corresponding metal-ammine complexes [Option ID = 2720]
Correct Answer :-
The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
[Question ID = 671]
1. 150 g [Option ID = 2682]
2. 300 g [Option ID = 2684]
3. 120 g [Option ID = 2681]
4. 180 g [Option ID = 2683]
Correct Answer :-
300 g [Option ID = 2684]
[Question ID = 756]
1. [Option ID = 3021]
2. [Option ID = 3022]
3. [Option ID = 3024]
4. [Option ID = 3023]
Correct Answer :-
43)
44)
45)
[Option ID = 3024]
[Question ID = 750]
1. [Option ID = 2999]
2. [Option ID = 3000]
3. [Option ID = 2997]
4. [Option ID = 2998]
Correct Answer :-
[Option ID = 2997]
[Question ID = 715]
1. [Option ID = 2857]
2. [Option ID = 2860]
3. [Option ID = 2858]
4. [Option ID = 2859]
Correct Answer :-
[Option ID = 2860]
46)
47)
[Question ID = 719]
1. [Option ID = 2873]
2. [Option ID = 2876]
3. [Option ID = 2874]
4. [Option ID = 2875]
Correct Answer :-
[Question ID = 674]
1. Evaporating some water to decrease the volume of the solution. [Option ID = 2696]
2. [Option ID = 2695]
3. [Option ID = 2694]
4. [Option ID = 2693]
Correct Answer :-
[Option ID = 2693]
[Question ID = 728]
1. [Option ID = 2910]
2. [Option ID = 2911]
3. [Option ID = 2909]
4. [Option ID = 2912]
48)
49)
50)
51)
Correct Answer :-
[Option ID = 2912]
[Question ID = 697]
1. III only [Option ID = 2788]
2. II only [Option ID = 2787]
3. I only [Option ID = 2785]
4. I, II and III [Option ID = 2786]
Correct Answer :-
I, II and III [Option ID = 2786]
[Question ID = 700]
1. [Option ID = 2798]
2. [Option ID = 2797]
3. [Option ID = 2800]
4. [Option ID = 2799]
Correct Answer :-
[Option ID = 2799]
[Question ID = 678]
1. Cr
2+
has a low cationic charge [Option ID = 2711]
2. F has -1 anionic charge and highly electronegative [Option ID = 2709]
3. Spin-orbit coupling in Cr
2+
[Option ID = 2712]
4. The Jahn-Teller effect [Option ID = 2710]
Correct Answer :-
The Jahn-Teller effect [Option ID = 2710]
[Question ID = 723]
1. [Option ID = 2889]
52)
53)
2. [Option ID = 2890]
3. [Option ID = 2891]
4. [Option ID = 2892]
Correct Answer :-
[Option ID = 2889]
[Question ID = 727]
1. [Option ID = 2907]
2. [Option ID = 2906]
3. [Option ID = 2905]
4. [Option ID = 2908]
Correct Answer :-
[Option ID = 2905]
[Question ID = 707]
54)
55)
56)
1. N9 [Option ID = 2828]
2. N7 [Option ID = 2827]
3. N1 [Option ID = 2825]
4. N3 [Option ID = 2826]
Correct Answer :-
N7 [Option ID = 2827]
[Question ID = 672]
1. Bicapped prism [Option ID = 2688]
2. Square pyramidal [Option ID = 2686]
3. Trigonal planar [Option ID = 2685]
4. Bent [Option ID = 2687]
Correct Answer :-
Square pyramidal [Option ID = 2686]
[Question ID = 704]
1. [Option ID = 2816]
2. [Option ID = 2814]
3. [Option ID = 2813]
4. [Option ID = 2815]
Correct Answer :-
[Option ID = 2813]
57)
58)
[Question ID = 708]
1. [Option ID = 2829]
2. [Option ID = 2832]
3. [Option ID = 2831]
4. [Option ID = 2830]
Correct Answer :-
[Option ID = 2831]
[Question ID = 717]
1. [Option ID = 2866]
2. [Option ID = 2865]
3. [Option ID = 2867]
4. [Option ID = 2868]
Correct Answer :-
[Option ID = 2866]
59)
[Question ID = 711]
1. [Option ID = 2843]
2. [Option ID = 2842]
3. [Option ID = 2844]
4. [Option ID = 2841]
Correct Answer :-
[Option ID = 2842]
[Question ID = 710]
1. [Option ID = 2838]
2. [Option ID = 2839]
3. [Option ID = 2837]
4. [Option ID = 2840]
Correct Answer :-
60)
61)
62)
[Option ID = 2838]
[Question ID = 682]
1. 0.30 M [Option ID = 2728]
2. 0.25 M [Option ID = 2727]
3. 0.60 M [Option ID = 2725]
4. 0.10 M [Option ID = 2726]
Correct Answer :-
0.30 M [Option ID = 2728]
[Question ID = 772]
1. [Option ID = 3087]
2. [Option ID = 3088]
3. [Option ID = 3086]
4. [Option ID = 3085]
Correct Answer :-
[Option ID = 3086]
[Question ID = 733]
1. [Option ID = 2932]
63)
64)
65)
2. [Option ID = 2929]
3. [Option ID = 2930]
4. [Option ID = 2931]
Correct Answer :-
[Option ID = 2929]
[Question ID = 767]
1. 120 [Option ID = 3065]
2. 280 [Option ID = 3066]
3. 300 [Option ID = 3068]
4. 20 [Option ID = 3067]
Correct Answer :-
20 [Option ID = 3067]
[Question ID = 734]
1. [Option ID = 2936]
2. [Option ID = 2933]
3. [Option ID = 2934]
4. [Option ID = 2935]
Correct Answer :-
[Option ID = 2935]
[Question ID = 676]
66)
67)
68)
1. [Option ID = 2702]
2. [Option ID = 2703]
3. [Option ID = 2704]
4. [Option ID = 2701]
Correct Answer :-
[Option ID = 2703]
[Question ID = 729]
1. (2Z, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2914]
2. (2E, 4E)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2915]
3. (2E, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2916]
4. (2Z, 4E)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2913]
Correct Answer :-
(2E, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2916]
[Question ID = 765]
1. [Option ID = 3060]
2. [Option ID = 3057]
3. [Option ID = 3058]
4. [Option ID = 3059]
Correct Answer :-
[Option ID = 3059]
[Question ID = 724]
1. [Option ID = 2893]
69)
2. [Option ID = 2895]
3. [Option ID = 2896]
4. [Option ID = 2894]
Correct Answer :-
[Option ID = 2893]
[Question ID = 721]
1. [Option ID = 2881]
2. [Option ID = 2884]
3. [Option ID = 2882]
4. [Option ID = 2883]
Correct Answer :-
[Option ID = 2882]
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
37)
38)
4. 3 [Option ID = 2753]
Correct Answer :-
1 [Option ID = 2755]
[Question ID = 718]
1. C) [Option ID = 2871]
2. B) [Option ID = 2870]
3. A) [Option ID = 2869]
4. D) both (B) and (C) [Option ID = 2872]
Correct Answer :-
A) [Option ID = 2869]
[Question ID = 709]
1. [Option ID = 2836]
2. [Option ID = 2833]
3. [Option ID = 2835]
4. [Option ID = 2834]
39)
40)
41)
42)
Correct Answer :-
[Option ID = 2836]
[Question ID = 705]
1. (2Z, 4Z)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2819]
2. (2E, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2817]
3. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2818]
4. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
Correct Answer :-
(2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
[Question ID = 680]
1. The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
2. Metal-EDTA complexes have an equilibrium concentration independent of pH [Option ID = 2718]
3. Metal-EDTA complexes are often 2:1 in stoichiometry [Option ID = 2717]
4. Metal-EDTA complexes are less stable than the corresponding metal-ammine complexes [Option ID = 2720]
Correct Answer :-
The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
[Question ID = 671]
1. 150 g [Option ID = 2682]
2. 300 g [Option ID = 2684]
3. 120 g [Option ID = 2681]
4. 180 g [Option ID = 2683]
Correct Answer :-
300 g [Option ID = 2684]
[Question ID = 756]
1. [Option ID = 3021]
2. [Option ID = 3022]
3. [Option ID = 3024]
4. [Option ID = 3023]
Correct Answer :-
43)
44)
45)
[Option ID = 3024]
[Question ID = 750]
1. [Option ID = 2999]
2. [Option ID = 3000]
3. [Option ID = 2997]
4. [Option ID = 2998]
Correct Answer :-
[Option ID = 2997]
[Question ID = 715]
1. [Option ID = 2857]
2. [Option ID = 2860]
3. [Option ID = 2858]
4. [Option ID = 2859]
Correct Answer :-
[Option ID = 2860]
46)
47)
[Question ID = 719]
1. [Option ID = 2873]
2. [Option ID = 2876]
3. [Option ID = 2874]
4. [Option ID = 2875]
Correct Answer :-
[Question ID = 674]
1. Evaporating some water to decrease the volume of the solution. [Option ID = 2696]
2. [Option ID = 2695]
3. [Option ID = 2694]
4. [Option ID = 2693]
Correct Answer :-
[Option ID = 2693]
[Question ID = 728]
1. [Option ID = 2910]
2. [Option ID = 2911]
3. [Option ID = 2909]
4. [Option ID = 2912]
48)
49)
50)
51)
Correct Answer :-
[Option ID = 2912]
[Question ID = 697]
1. III only [Option ID = 2788]
2. II only [Option ID = 2787]
3. I only [Option ID = 2785]
4. I, II and III [Option ID = 2786]
Correct Answer :-
I, II and III [Option ID = 2786]
[Question ID = 700]
1. [Option ID = 2798]
2. [Option ID = 2797]
3. [Option ID = 2800]
4. [Option ID = 2799]
Correct Answer :-
[Option ID = 2799]
[Question ID = 678]
1. Cr
2+
has a low cationic charge [Option ID = 2711]
2. F has -1 anionic charge and highly electronegative [Option ID = 2709]
3. Spin-orbit coupling in Cr
2+
[Option ID = 2712]
4. The Jahn-Teller effect [Option ID = 2710]
Correct Answer :-
The Jahn-Teller effect [Option ID = 2710]
[Question ID = 723]
1. [Option ID = 2889]
52)
53)
2. [Option ID = 2890]
3. [Option ID = 2891]
4. [Option ID = 2892]
Correct Answer :-
[Option ID = 2889]
[Question ID = 727]
1. [Option ID = 2907]
2. [Option ID = 2906]
3. [Option ID = 2905]
4. [Option ID = 2908]
Correct Answer :-
[Option ID = 2905]
[Question ID = 707]
54)
55)
56)
1. N9 [Option ID = 2828]
2. N7 [Option ID = 2827]
3. N1 [Option ID = 2825]
4. N3 [Option ID = 2826]
Correct Answer :-
N7 [Option ID = 2827]
[Question ID = 672]
1. Bicapped prism [Option ID = 2688]
2. Square pyramidal [Option ID = 2686]
3. Trigonal planar [Option ID = 2685]
4. Bent [Option ID = 2687]
Correct Answer :-
Square pyramidal [Option ID = 2686]
[Question ID = 704]
1. [Option ID = 2816]
2. [Option ID = 2814]
3. [Option ID = 2813]
4. [Option ID = 2815]
Correct Answer :-
[Option ID = 2813]
57)
58)
[Question ID = 708]
1. [Option ID = 2829]
2. [Option ID = 2832]
3. [Option ID = 2831]
4. [Option ID = 2830]
Correct Answer :-
[Option ID = 2831]
[Question ID = 717]
1. [Option ID = 2866]
2. [Option ID = 2865]
3. [Option ID = 2867]
4. [Option ID = 2868]
Correct Answer :-
[Option ID = 2866]
59)
[Question ID = 711]
1. [Option ID = 2843]
2. [Option ID = 2842]
3. [Option ID = 2844]
4. [Option ID = 2841]
Correct Answer :-
[Option ID = 2842]
[Question ID = 710]
1. [Option ID = 2838]
2. [Option ID = 2839]
3. [Option ID = 2837]
4. [Option ID = 2840]
Correct Answer :-
60)
61)
62)
[Option ID = 2838]
[Question ID = 682]
1. 0.30 M [Option ID = 2728]
2. 0.25 M [Option ID = 2727]
3. 0.60 M [Option ID = 2725]
4. 0.10 M [Option ID = 2726]
Correct Answer :-
0.30 M [Option ID = 2728]
[Question ID = 772]
1. [Option ID = 3087]
2. [Option ID = 3088]
3. [Option ID = 3086]
4. [Option ID = 3085]
Correct Answer :-
[Option ID = 3086]
[Question ID = 733]
1. [Option ID = 2932]
63)
64)
65)
2. [Option ID = 2929]
3. [Option ID = 2930]
4. [Option ID = 2931]
Correct Answer :-
[Option ID = 2929]
[Question ID = 767]
1. 120 [Option ID = 3065]
2. 280 [Option ID = 3066]
3. 300 [Option ID = 3068]
4. 20 [Option ID = 3067]
Correct Answer :-
20 [Option ID = 3067]
[Question ID = 734]
1. [Option ID = 2936]
2. [Option ID = 2933]
3. [Option ID = 2934]
4. [Option ID = 2935]
Correct Answer :-
[Option ID = 2935]
[Question ID = 676]
66)
67)
68)
1. [Option ID = 2702]
2. [Option ID = 2703]
3. [Option ID = 2704]
4. [Option ID = 2701]
Correct Answer :-
[Option ID = 2703]
[Question ID = 729]
1. (2Z, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2914]
2. (2E, 4E)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2915]
3. (2E, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2916]
4. (2Z, 4E)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2913]
Correct Answer :-
(2E, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2916]
[Question ID = 765]
1. [Option ID = 3060]
2. [Option ID = 3057]
3. [Option ID = 3058]
4. [Option ID = 3059]
Correct Answer :-
[Option ID = 3059]
[Question ID = 724]
1. [Option ID = 2893]
69)
2. [Option ID = 2895]
3. [Option ID = 2896]
4. [Option ID = 2894]
Correct Answer :-
[Option ID = 2893]
[Question ID = 721]
1. [Option ID = 2881]
2. [Option ID = 2884]
3. [Option ID = 2882]
4. [Option ID = 2883]
Correct Answer :-
[Option ID = 2882]
70)
71)
72)
73)
[Question ID = 766]
1. 512 times [Option ID = 3064]
2. 256 times [Option ID = 3063]
3. 128 times [Option ID = 3062]
4. 64 times [Option ID = 3061]
Correct Answer :-
512 times [Option ID = 3064]
[Question ID = 670]
1. 2 [Option ID = 2678]
2. 5 [Option ID = 2680]
3. 1 [Option ID = 2677]
4. 3 [Option ID = 2679]
Correct Answer :-
5 [Option ID = 2680]
[Question ID = 731]
1. [Option ID = 2924]
2. [Option ID = 2923]
3. [Option ID = 2922]
4. [Option ID = 2921]
Correct Answer :-
[Option ID = 2922]
[Question ID = 690]
1. [Option ID = 2760]
2. [Option ID = 2759]
3. [Option ID = 2757]
4. [Option ID = 2758]
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
37)
38)
4. 3 [Option ID = 2753]
Correct Answer :-
1 [Option ID = 2755]
[Question ID = 718]
1. C) [Option ID = 2871]
2. B) [Option ID = 2870]
3. A) [Option ID = 2869]
4. D) both (B) and (C) [Option ID = 2872]
Correct Answer :-
A) [Option ID = 2869]
[Question ID = 709]
1. [Option ID = 2836]
2. [Option ID = 2833]
3. [Option ID = 2835]
4. [Option ID = 2834]
39)
40)
41)
42)
Correct Answer :-
[Option ID = 2836]
[Question ID = 705]
1. (2Z, 4Z)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2819]
2. (2E, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2817]
3. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2818]
4. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
Correct Answer :-
(2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
[Question ID = 680]
1. The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
2. Metal-EDTA complexes have an equilibrium concentration independent of pH [Option ID = 2718]
3. Metal-EDTA complexes are often 2:1 in stoichiometry [Option ID = 2717]
4. Metal-EDTA complexes are less stable than the corresponding metal-ammine complexes [Option ID = 2720]
Correct Answer :-
The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
[Question ID = 671]
1. 150 g [Option ID = 2682]
2. 300 g [Option ID = 2684]
3. 120 g [Option ID = 2681]
4. 180 g [Option ID = 2683]
Correct Answer :-
300 g [Option ID = 2684]
[Question ID = 756]
1. [Option ID = 3021]
2. [Option ID = 3022]
3. [Option ID = 3024]
4. [Option ID = 3023]
Correct Answer :-
43)
44)
45)
[Option ID = 3024]
[Question ID = 750]
1. [Option ID = 2999]
2. [Option ID = 3000]
3. [Option ID = 2997]
4. [Option ID = 2998]
Correct Answer :-
[Option ID = 2997]
[Question ID = 715]
1. [Option ID = 2857]
2. [Option ID = 2860]
3. [Option ID = 2858]
4. [Option ID = 2859]
Correct Answer :-
[Option ID = 2860]
46)
47)
[Question ID = 719]
1. [Option ID = 2873]
2. [Option ID = 2876]
3. [Option ID = 2874]
4. [Option ID = 2875]
Correct Answer :-
[Question ID = 674]
1. Evaporating some water to decrease the volume of the solution. [Option ID = 2696]
2. [Option ID = 2695]
3. [Option ID = 2694]
4. [Option ID = 2693]
Correct Answer :-
[Option ID = 2693]
[Question ID = 728]
1. [Option ID = 2910]
2. [Option ID = 2911]
3. [Option ID = 2909]
4. [Option ID = 2912]
48)
49)
50)
51)
Correct Answer :-
[Option ID = 2912]
[Question ID = 697]
1. III only [Option ID = 2788]
2. II only [Option ID = 2787]
3. I only [Option ID = 2785]
4. I, II and III [Option ID = 2786]
Correct Answer :-
I, II and III [Option ID = 2786]
[Question ID = 700]
1. [Option ID = 2798]
2. [Option ID = 2797]
3. [Option ID = 2800]
4. [Option ID = 2799]
Correct Answer :-
[Option ID = 2799]
[Question ID = 678]
1. Cr
2+
has a low cationic charge [Option ID = 2711]
2. F has -1 anionic charge and highly electronegative [Option ID = 2709]
3. Spin-orbit coupling in Cr
2+
[Option ID = 2712]
4. The Jahn-Teller effect [Option ID = 2710]
Correct Answer :-
The Jahn-Teller effect [Option ID = 2710]
[Question ID = 723]
1. [Option ID = 2889]
52)
53)
2. [Option ID = 2890]
3. [Option ID = 2891]
4. [Option ID = 2892]
Correct Answer :-
[Option ID = 2889]
[Question ID = 727]
1. [Option ID = 2907]
2. [Option ID = 2906]
3. [Option ID = 2905]
4. [Option ID = 2908]
Correct Answer :-
[Option ID = 2905]
[Question ID = 707]
54)
55)
56)
1. N9 [Option ID = 2828]
2. N7 [Option ID = 2827]
3. N1 [Option ID = 2825]
4. N3 [Option ID = 2826]
Correct Answer :-
N7 [Option ID = 2827]
[Question ID = 672]
1. Bicapped prism [Option ID = 2688]
2. Square pyramidal [Option ID = 2686]
3. Trigonal planar [Option ID = 2685]
4. Bent [Option ID = 2687]
Correct Answer :-
Square pyramidal [Option ID = 2686]
[Question ID = 704]
1. [Option ID = 2816]
2. [Option ID = 2814]
3. [Option ID = 2813]
4. [Option ID = 2815]
Correct Answer :-
[Option ID = 2813]
57)
58)
[Question ID = 708]
1. [Option ID = 2829]
2. [Option ID = 2832]
3. [Option ID = 2831]
4. [Option ID = 2830]
Correct Answer :-
[Option ID = 2831]
[Question ID = 717]
1. [Option ID = 2866]
2. [Option ID = 2865]
3. [Option ID = 2867]
4. [Option ID = 2868]
Correct Answer :-
[Option ID = 2866]
59)
[Question ID = 711]
1. [Option ID = 2843]
2. [Option ID = 2842]
3. [Option ID = 2844]
4. [Option ID = 2841]
Correct Answer :-
[Option ID = 2842]
[Question ID = 710]
1. [Option ID = 2838]
2. [Option ID = 2839]
3. [Option ID = 2837]
4. [Option ID = 2840]
Correct Answer :-
60)
61)
62)
[Option ID = 2838]
[Question ID = 682]
1. 0.30 M [Option ID = 2728]
2. 0.25 M [Option ID = 2727]
3. 0.60 M [Option ID = 2725]
4. 0.10 M [Option ID = 2726]
Correct Answer :-
0.30 M [Option ID = 2728]
[Question ID = 772]
1. [Option ID = 3087]
2. [Option ID = 3088]
3. [Option ID = 3086]
4. [Option ID = 3085]
Correct Answer :-
[Option ID = 3086]
[Question ID = 733]
1. [Option ID = 2932]
63)
64)
65)
2. [Option ID = 2929]
3. [Option ID = 2930]
4. [Option ID = 2931]
Correct Answer :-
[Option ID = 2929]
[Question ID = 767]
1. 120 [Option ID = 3065]
2. 280 [Option ID = 3066]
3. 300 [Option ID = 3068]
4. 20 [Option ID = 3067]
Correct Answer :-
20 [Option ID = 3067]
[Question ID = 734]
1. [Option ID = 2936]
2. [Option ID = 2933]
3. [Option ID = 2934]
4. [Option ID = 2935]
Correct Answer :-
[Option ID = 2935]
[Question ID = 676]
66)
67)
68)
1. [Option ID = 2702]
2. [Option ID = 2703]
3. [Option ID = 2704]
4. [Option ID = 2701]
Correct Answer :-
[Option ID = 2703]
[Question ID = 729]
1. (2Z, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2914]
2. (2E, 4E)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2915]
3. (2E, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2916]
4. (2Z, 4E)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2913]
Correct Answer :-
(2E, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2916]
[Question ID = 765]
1. [Option ID = 3060]
2. [Option ID = 3057]
3. [Option ID = 3058]
4. [Option ID = 3059]
Correct Answer :-
[Option ID = 3059]
[Question ID = 724]
1. [Option ID = 2893]
69)
2. [Option ID = 2895]
3. [Option ID = 2896]
4. [Option ID = 2894]
Correct Answer :-
[Option ID = 2893]
[Question ID = 721]
1. [Option ID = 2881]
2. [Option ID = 2884]
3. [Option ID = 2882]
4. [Option ID = 2883]
Correct Answer :-
[Option ID = 2882]
70)
71)
72)
73)
[Question ID = 766]
1. 512 times [Option ID = 3064]
2. 256 times [Option ID = 3063]
3. 128 times [Option ID = 3062]
4. 64 times [Option ID = 3061]
Correct Answer :-
512 times [Option ID = 3064]
[Question ID = 670]
1. 2 [Option ID = 2678]
2. 5 [Option ID = 2680]
3. 1 [Option ID = 2677]
4. 3 [Option ID = 2679]
Correct Answer :-
5 [Option ID = 2680]
[Question ID = 731]
1. [Option ID = 2924]
2. [Option ID = 2923]
3. [Option ID = 2922]
4. [Option ID = 2921]
Correct Answer :-
[Option ID = 2922]
[Question ID = 690]
1. [Option ID = 2760]
2. [Option ID = 2759]
3. [Option ID = 2757]
4. [Option ID = 2758]
74)
75)
Correct Answer :-
[Option ID = 2758]
[Question ID = 720]
1. [Option ID = 2879]
2. [Option ID = 2878]
3. [Option ID = 2880]
4. [Option ID = 2877]
Correct Answer :-
[Option ID = 2877]
[Question ID = 722]
1. [Option ID = 2886]
2. [Option ID = 2888]
3. [Option ID = 2885]
4. [Option ID = 2887]
Correct Answer :-
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
37)
38)
4. 3 [Option ID = 2753]
Correct Answer :-
1 [Option ID = 2755]
[Question ID = 718]
1. C) [Option ID = 2871]
2. B) [Option ID = 2870]
3. A) [Option ID = 2869]
4. D) both (B) and (C) [Option ID = 2872]
Correct Answer :-
A) [Option ID = 2869]
[Question ID = 709]
1. [Option ID = 2836]
2. [Option ID = 2833]
3. [Option ID = 2835]
4. [Option ID = 2834]
39)
40)
41)
42)
Correct Answer :-
[Option ID = 2836]
[Question ID = 705]
1. (2Z, 4Z)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2819]
2. (2E, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2817]
3. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2818]
4. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
Correct Answer :-
(2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
[Question ID = 680]
1. The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
2. Metal-EDTA complexes have an equilibrium concentration independent of pH [Option ID = 2718]
3. Metal-EDTA complexes are often 2:1 in stoichiometry [Option ID = 2717]
4. Metal-EDTA complexes are less stable than the corresponding metal-ammine complexes [Option ID = 2720]
Correct Answer :-
The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
[Question ID = 671]
1. 150 g [Option ID = 2682]
2. 300 g [Option ID = 2684]
3. 120 g [Option ID = 2681]
4. 180 g [Option ID = 2683]
Correct Answer :-
300 g [Option ID = 2684]
[Question ID = 756]
1. [Option ID = 3021]
2. [Option ID = 3022]
3. [Option ID = 3024]
4. [Option ID = 3023]
Correct Answer :-
43)
44)
45)
[Option ID = 3024]
[Question ID = 750]
1. [Option ID = 2999]
2. [Option ID = 3000]
3. [Option ID = 2997]
4. [Option ID = 2998]
Correct Answer :-
[Option ID = 2997]
[Question ID = 715]
1. [Option ID = 2857]
2. [Option ID = 2860]
3. [Option ID = 2858]
4. [Option ID = 2859]
Correct Answer :-
[Option ID = 2860]
46)
47)
[Question ID = 719]
1. [Option ID = 2873]
2. [Option ID = 2876]
3. [Option ID = 2874]
4. [Option ID = 2875]
Correct Answer :-
[Question ID = 674]
1. Evaporating some water to decrease the volume of the solution. [Option ID = 2696]
2. [Option ID = 2695]
3. [Option ID = 2694]
4. [Option ID = 2693]
Correct Answer :-
[Option ID = 2693]
[Question ID = 728]
1. [Option ID = 2910]
2. [Option ID = 2911]
3. [Option ID = 2909]
4. [Option ID = 2912]
48)
49)
50)
51)
Correct Answer :-
[Option ID = 2912]
[Question ID = 697]
1. III only [Option ID = 2788]
2. II only [Option ID = 2787]
3. I only [Option ID = 2785]
4. I, II and III [Option ID = 2786]
Correct Answer :-
I, II and III [Option ID = 2786]
[Question ID = 700]
1. [Option ID = 2798]
2. [Option ID = 2797]
3. [Option ID = 2800]
4. [Option ID = 2799]
Correct Answer :-
[Option ID = 2799]
[Question ID = 678]
1. Cr
2+
has a low cationic charge [Option ID = 2711]
2. F has -1 anionic charge and highly electronegative [Option ID = 2709]
3. Spin-orbit coupling in Cr
2+
[Option ID = 2712]
4. The Jahn-Teller effect [Option ID = 2710]
Correct Answer :-
The Jahn-Teller effect [Option ID = 2710]
[Question ID = 723]
1. [Option ID = 2889]
52)
53)
2. [Option ID = 2890]
3. [Option ID = 2891]
4. [Option ID = 2892]
Correct Answer :-
[Option ID = 2889]
[Question ID = 727]
1. [Option ID = 2907]
2. [Option ID = 2906]
3. [Option ID = 2905]
4. [Option ID = 2908]
Correct Answer :-
[Option ID = 2905]
[Question ID = 707]
54)
55)
56)
1. N9 [Option ID = 2828]
2. N7 [Option ID = 2827]
3. N1 [Option ID = 2825]
4. N3 [Option ID = 2826]
Correct Answer :-
N7 [Option ID = 2827]
[Question ID = 672]
1. Bicapped prism [Option ID = 2688]
2. Square pyramidal [Option ID = 2686]
3. Trigonal planar [Option ID = 2685]
4. Bent [Option ID = 2687]
Correct Answer :-
Square pyramidal [Option ID = 2686]
[Question ID = 704]
1. [Option ID = 2816]
2. [Option ID = 2814]
3. [Option ID = 2813]
4. [Option ID = 2815]
Correct Answer :-
[Option ID = 2813]
57)
58)
[Question ID = 708]
1. [Option ID = 2829]
2. [Option ID = 2832]
3. [Option ID = 2831]
4. [Option ID = 2830]
Correct Answer :-
[Option ID = 2831]
[Question ID = 717]
1. [Option ID = 2866]
2. [Option ID = 2865]
3. [Option ID = 2867]
4. [Option ID = 2868]
Correct Answer :-
[Option ID = 2866]
59)
[Question ID = 711]
1. [Option ID = 2843]
2. [Option ID = 2842]
3. [Option ID = 2844]
4. [Option ID = 2841]
Correct Answer :-
[Option ID = 2842]
[Question ID = 710]
1. [Option ID = 2838]
2. [Option ID = 2839]
3. [Option ID = 2837]
4. [Option ID = 2840]
Correct Answer :-
60)
61)
62)
[Option ID = 2838]
[Question ID = 682]
1. 0.30 M [Option ID = 2728]
2. 0.25 M [Option ID = 2727]
3. 0.60 M [Option ID = 2725]
4. 0.10 M [Option ID = 2726]
Correct Answer :-
0.30 M [Option ID = 2728]
[Question ID = 772]
1. [Option ID = 3087]
2. [Option ID = 3088]
3. [Option ID = 3086]
4. [Option ID = 3085]
Correct Answer :-
[Option ID = 3086]
[Question ID = 733]
1. [Option ID = 2932]
63)
64)
65)
2. [Option ID = 2929]
3. [Option ID = 2930]
4. [Option ID = 2931]
Correct Answer :-
[Option ID = 2929]
[Question ID = 767]
1. 120 [Option ID = 3065]
2. 280 [Option ID = 3066]
3. 300 [Option ID = 3068]
4. 20 [Option ID = 3067]
Correct Answer :-
20 [Option ID = 3067]
[Question ID = 734]
1. [Option ID = 2936]
2. [Option ID = 2933]
3. [Option ID = 2934]
4. [Option ID = 2935]
Correct Answer :-
[Option ID = 2935]
[Question ID = 676]
66)
67)
68)
1. [Option ID = 2702]
2. [Option ID = 2703]
3. [Option ID = 2704]
4. [Option ID = 2701]
Correct Answer :-
[Option ID = 2703]
[Question ID = 729]
1. (2Z, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2914]
2. (2E, 4E)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2915]
3. (2E, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2916]
4. (2Z, 4E)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2913]
Correct Answer :-
(2E, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2916]
[Question ID = 765]
1. [Option ID = 3060]
2. [Option ID = 3057]
3. [Option ID = 3058]
4. [Option ID = 3059]
Correct Answer :-
[Option ID = 3059]
[Question ID = 724]
1. [Option ID = 2893]
69)
2. [Option ID = 2895]
3. [Option ID = 2896]
4. [Option ID = 2894]
Correct Answer :-
[Option ID = 2893]
[Question ID = 721]
1. [Option ID = 2881]
2. [Option ID = 2884]
3. [Option ID = 2882]
4. [Option ID = 2883]
Correct Answer :-
[Option ID = 2882]
70)
71)
72)
73)
[Question ID = 766]
1. 512 times [Option ID = 3064]
2. 256 times [Option ID = 3063]
3. 128 times [Option ID = 3062]
4. 64 times [Option ID = 3061]
Correct Answer :-
512 times [Option ID = 3064]
[Question ID = 670]
1. 2 [Option ID = 2678]
2. 5 [Option ID = 2680]
3. 1 [Option ID = 2677]
4. 3 [Option ID = 2679]
Correct Answer :-
5 [Option ID = 2680]
[Question ID = 731]
1. [Option ID = 2924]
2. [Option ID = 2923]
3. [Option ID = 2922]
4. [Option ID = 2921]
Correct Answer :-
[Option ID = 2922]
[Question ID = 690]
1. [Option ID = 2760]
2. [Option ID = 2759]
3. [Option ID = 2757]
4. [Option ID = 2758]
74)
75)
Correct Answer :-
[Option ID = 2758]
[Question ID = 720]
1. [Option ID = 2879]
2. [Option ID = 2878]
3. [Option ID = 2880]
4. [Option ID = 2877]
Correct Answer :-
[Option ID = 2877]
[Question ID = 722]
1. [Option ID = 2886]
2. [Option ID = 2888]
3. [Option ID = 2885]
4. [Option ID = 2887]
Correct Answer :-
76)
77)
78)
[Option ID = 2887]
[Question ID = 755]
1. [Option ID = 3019]
2. [Option ID = 3018]
3. [Option ID = 3020]
4. [Option ID = 3017]
Correct Answer :-
[Option ID = 3019]
[Question ID = 695]
1. Ba [Option ID = 2779]
2. BaO [Option ID = 2780]
3. BaOH [Option ID = 2778]
4. BaH
2
[Option ID = 2777]
Correct Answer :-
BaO [Option ID = 2780]
[Question ID = 703]
1. [Option ID = 2811]
2. [Option ID = 2809]
3. [Option ID = 2812]
4. [Option ID = 2810]
Correct Answer :-
[Option ID = 2811]
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
37)
38)
4. 3 [Option ID = 2753]
Correct Answer :-
1 [Option ID = 2755]
[Question ID = 718]
1. C) [Option ID = 2871]
2. B) [Option ID = 2870]
3. A) [Option ID = 2869]
4. D) both (B) and (C) [Option ID = 2872]
Correct Answer :-
A) [Option ID = 2869]
[Question ID = 709]
1. [Option ID = 2836]
2. [Option ID = 2833]
3. [Option ID = 2835]
4. [Option ID = 2834]
39)
40)
41)
42)
Correct Answer :-
[Option ID = 2836]
[Question ID = 705]
1. (2Z, 4Z)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2819]
2. (2E, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2817]
3. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2818]
4. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
Correct Answer :-
(2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
[Question ID = 680]
1. The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
2. Metal-EDTA complexes have an equilibrium concentration independent of pH [Option ID = 2718]
3. Metal-EDTA complexes are often 2:1 in stoichiometry [Option ID = 2717]
4. Metal-EDTA complexes are less stable than the corresponding metal-ammine complexes [Option ID = 2720]
Correct Answer :-
The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
[Question ID = 671]
1. 150 g [Option ID = 2682]
2. 300 g [Option ID = 2684]
3. 120 g [Option ID = 2681]
4. 180 g [Option ID = 2683]
Correct Answer :-
300 g [Option ID = 2684]
[Question ID = 756]
1. [Option ID = 3021]
2. [Option ID = 3022]
3. [Option ID = 3024]
4. [Option ID = 3023]
Correct Answer :-
43)
44)
45)
[Option ID = 3024]
[Question ID = 750]
1. [Option ID = 2999]
2. [Option ID = 3000]
3. [Option ID = 2997]
4. [Option ID = 2998]
Correct Answer :-
[Option ID = 2997]
[Question ID = 715]
1. [Option ID = 2857]
2. [Option ID = 2860]
3. [Option ID = 2858]
4. [Option ID = 2859]
Correct Answer :-
[Option ID = 2860]
46)
47)
[Question ID = 719]
1. [Option ID = 2873]
2. [Option ID = 2876]
3. [Option ID = 2874]
4. [Option ID = 2875]
Correct Answer :-
[Question ID = 674]
1. Evaporating some water to decrease the volume of the solution. [Option ID = 2696]
2. [Option ID = 2695]
3. [Option ID = 2694]
4. [Option ID = 2693]
Correct Answer :-
[Option ID = 2693]
[Question ID = 728]
1. [Option ID = 2910]
2. [Option ID = 2911]
3. [Option ID = 2909]
4. [Option ID = 2912]
48)
49)
50)
51)
Correct Answer :-
[Option ID = 2912]
[Question ID = 697]
1. III only [Option ID = 2788]
2. II only [Option ID = 2787]
3. I only [Option ID = 2785]
4. I, II and III [Option ID = 2786]
Correct Answer :-
I, II and III [Option ID = 2786]
[Question ID = 700]
1. [Option ID = 2798]
2. [Option ID = 2797]
3. [Option ID = 2800]
4. [Option ID = 2799]
Correct Answer :-
[Option ID = 2799]
[Question ID = 678]
1. Cr
2+
has a low cationic charge [Option ID = 2711]
2. F has -1 anionic charge and highly electronegative [Option ID = 2709]
3. Spin-orbit coupling in Cr
2+
[Option ID = 2712]
4. The Jahn-Teller effect [Option ID = 2710]
Correct Answer :-
The Jahn-Teller effect [Option ID = 2710]
[Question ID = 723]
1. [Option ID = 2889]
52)
53)
2. [Option ID = 2890]
3. [Option ID = 2891]
4. [Option ID = 2892]
Correct Answer :-
[Option ID = 2889]
[Question ID = 727]
1. [Option ID = 2907]
2. [Option ID = 2906]
3. [Option ID = 2905]
4. [Option ID = 2908]
Correct Answer :-
[Option ID = 2905]
[Question ID = 707]
54)
55)
56)
1. N9 [Option ID = 2828]
2. N7 [Option ID = 2827]
3. N1 [Option ID = 2825]
4. N3 [Option ID = 2826]
Correct Answer :-
N7 [Option ID = 2827]
[Question ID = 672]
1. Bicapped prism [Option ID = 2688]
2. Square pyramidal [Option ID = 2686]
3. Trigonal planar [Option ID = 2685]
4. Bent [Option ID = 2687]
Correct Answer :-
Square pyramidal [Option ID = 2686]
[Question ID = 704]
1. [Option ID = 2816]
2. [Option ID = 2814]
3. [Option ID = 2813]
4. [Option ID = 2815]
Correct Answer :-
[Option ID = 2813]
57)
58)
[Question ID = 708]
1. [Option ID = 2829]
2. [Option ID = 2832]
3. [Option ID = 2831]
4. [Option ID = 2830]
Correct Answer :-
[Option ID = 2831]
[Question ID = 717]
1. [Option ID = 2866]
2. [Option ID = 2865]
3. [Option ID = 2867]
4. [Option ID = 2868]
Correct Answer :-
[Option ID = 2866]
59)
[Question ID = 711]
1. [Option ID = 2843]
2. [Option ID = 2842]
3. [Option ID = 2844]
4. [Option ID = 2841]
Correct Answer :-
[Option ID = 2842]
[Question ID = 710]
1. [Option ID = 2838]
2. [Option ID = 2839]
3. [Option ID = 2837]
4. [Option ID = 2840]
Correct Answer :-
60)
61)
62)
[Option ID = 2838]
[Question ID = 682]
1. 0.30 M [Option ID = 2728]
2. 0.25 M [Option ID = 2727]
3. 0.60 M [Option ID = 2725]
4. 0.10 M [Option ID = 2726]
Correct Answer :-
0.30 M [Option ID = 2728]
[Question ID = 772]
1. [Option ID = 3087]
2. [Option ID = 3088]
3. [Option ID = 3086]
4. [Option ID = 3085]
Correct Answer :-
[Option ID = 3086]
[Question ID = 733]
1. [Option ID = 2932]
63)
64)
65)
2. [Option ID = 2929]
3. [Option ID = 2930]
4. [Option ID = 2931]
Correct Answer :-
[Option ID = 2929]
[Question ID = 767]
1. 120 [Option ID = 3065]
2. 280 [Option ID = 3066]
3. 300 [Option ID = 3068]
4. 20 [Option ID = 3067]
Correct Answer :-
20 [Option ID = 3067]
[Question ID = 734]
1. [Option ID = 2936]
2. [Option ID = 2933]
3. [Option ID = 2934]
4. [Option ID = 2935]
Correct Answer :-
[Option ID = 2935]
[Question ID = 676]
66)
67)
68)
1. [Option ID = 2702]
2. [Option ID = 2703]
3. [Option ID = 2704]
4. [Option ID = 2701]
Correct Answer :-
[Option ID = 2703]
[Question ID = 729]
1. (2Z, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2914]
2. (2E, 4E)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2915]
3. (2E, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2916]
4. (2Z, 4E)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2913]
Correct Answer :-
(2E, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2916]
[Question ID = 765]
1. [Option ID = 3060]
2. [Option ID = 3057]
3. [Option ID = 3058]
4. [Option ID = 3059]
Correct Answer :-
[Option ID = 3059]
[Question ID = 724]
1. [Option ID = 2893]
69)
2. [Option ID = 2895]
3. [Option ID = 2896]
4. [Option ID = 2894]
Correct Answer :-
[Option ID = 2893]
[Question ID = 721]
1. [Option ID = 2881]
2. [Option ID = 2884]
3. [Option ID = 2882]
4. [Option ID = 2883]
Correct Answer :-
[Option ID = 2882]
70)
71)
72)
73)
[Question ID = 766]
1. 512 times [Option ID = 3064]
2. 256 times [Option ID = 3063]
3. 128 times [Option ID = 3062]
4. 64 times [Option ID = 3061]
Correct Answer :-
512 times [Option ID = 3064]
[Question ID = 670]
1. 2 [Option ID = 2678]
2. 5 [Option ID = 2680]
3. 1 [Option ID = 2677]
4. 3 [Option ID = 2679]
Correct Answer :-
5 [Option ID = 2680]
[Question ID = 731]
1. [Option ID = 2924]
2. [Option ID = 2923]
3. [Option ID = 2922]
4. [Option ID = 2921]
Correct Answer :-
[Option ID = 2922]
[Question ID = 690]
1. [Option ID = 2760]
2. [Option ID = 2759]
3. [Option ID = 2757]
4. [Option ID = 2758]
74)
75)
Correct Answer :-
[Option ID = 2758]
[Question ID = 720]
1. [Option ID = 2879]
2. [Option ID = 2878]
3. [Option ID = 2880]
4. [Option ID = 2877]
Correct Answer :-
[Option ID = 2877]
[Question ID = 722]
1. [Option ID = 2886]
2. [Option ID = 2888]
3. [Option ID = 2885]
4. [Option ID = 2887]
Correct Answer :-
76)
77)
78)
[Option ID = 2887]
[Question ID = 755]
1. [Option ID = 3019]
2. [Option ID = 3018]
3. [Option ID = 3020]
4. [Option ID = 3017]
Correct Answer :-
[Option ID = 3019]
[Question ID = 695]
1. Ba [Option ID = 2779]
2. BaO [Option ID = 2780]
3. BaOH [Option ID = 2778]
4. BaH
2
[Option ID = 2777]
Correct Answer :-
BaO [Option ID = 2780]
[Question ID = 703]
1. [Option ID = 2811]
2. [Option ID = 2809]
3. [Option ID = 2812]
4. [Option ID = 2810]
Correct Answer :-
[Option ID = 2811]
79)
80)
81)
82)
83)
[Option ID = 2810]
[Question ID = 732]
1. [Option ID = 2927]
2. [Option ID = 2928]
3. [Option ID = 2926]
4. [Option ID = 2925]
Correct Answer :-
[Option ID = 2926]
A monoatomic gas following Fermi-Dirac statistics begins to follow Maxwell-Boltzmann statistics at: [Question ID = 735]
1. Low Temperature and low density [Option ID = 2937]
2. High Temperature and high density [Option ID = 2940]
3. Low Temperature and high density [Option ID = 2938]
4. High Temperature and low density [Option ID = 2939]
Correct Answer :-
High Temperature and low density [Option ID = 2939]
The Dulong and Petit?s Law says that the molar heat capacity of elements is: [Question ID = 741]
1. [Option ID = 2964]
2. [Option ID = 2961]
3. [Option ID = 2963]
4. [Option ID = 2962]
Correct Answer :-
[Option ID = 2961]
What is the most common natural form in which fluorine is found on earth?
[Question ID = 684]
1. As a fluoride ion in various minerals [Option ID = 2735]
2. As weak acid HF (aq) [Option ID = 2734]
3. In various fluorocarbon compounds in the atmosphere. [Option ID = 2736]
4. As XeF
2
(s)
[Option ID = 2733]
Correct Answer :-
As a fluoride ion in various minerals [Option ID = 2735]
What is the correct form of Stirling?s approximation?
[Question ID = 738]
1. [Option ID = 2950]
2. [Option ID = 2951]
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
37)
38)
4. 3 [Option ID = 2753]
Correct Answer :-
1 [Option ID = 2755]
[Question ID = 718]
1. C) [Option ID = 2871]
2. B) [Option ID = 2870]
3. A) [Option ID = 2869]
4. D) both (B) and (C) [Option ID = 2872]
Correct Answer :-
A) [Option ID = 2869]
[Question ID = 709]
1. [Option ID = 2836]
2. [Option ID = 2833]
3. [Option ID = 2835]
4. [Option ID = 2834]
39)
40)
41)
42)
Correct Answer :-
[Option ID = 2836]
[Question ID = 705]
1. (2Z, 4Z)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2819]
2. (2E, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2817]
3. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2818]
4. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
Correct Answer :-
(2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
[Question ID = 680]
1. The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
2. Metal-EDTA complexes have an equilibrium concentration independent of pH [Option ID = 2718]
3. Metal-EDTA complexes are often 2:1 in stoichiometry [Option ID = 2717]
4. Metal-EDTA complexes are less stable than the corresponding metal-ammine complexes [Option ID = 2720]
Correct Answer :-
The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
[Question ID = 671]
1. 150 g [Option ID = 2682]
2. 300 g [Option ID = 2684]
3. 120 g [Option ID = 2681]
4. 180 g [Option ID = 2683]
Correct Answer :-
300 g [Option ID = 2684]
[Question ID = 756]
1. [Option ID = 3021]
2. [Option ID = 3022]
3. [Option ID = 3024]
4. [Option ID = 3023]
Correct Answer :-
43)
44)
45)
[Option ID = 3024]
[Question ID = 750]
1. [Option ID = 2999]
2. [Option ID = 3000]
3. [Option ID = 2997]
4. [Option ID = 2998]
Correct Answer :-
[Option ID = 2997]
[Question ID = 715]
1. [Option ID = 2857]
2. [Option ID = 2860]
3. [Option ID = 2858]
4. [Option ID = 2859]
Correct Answer :-
[Option ID = 2860]
46)
47)
[Question ID = 719]
1. [Option ID = 2873]
2. [Option ID = 2876]
3. [Option ID = 2874]
4. [Option ID = 2875]
Correct Answer :-
[Question ID = 674]
1. Evaporating some water to decrease the volume of the solution. [Option ID = 2696]
2. [Option ID = 2695]
3. [Option ID = 2694]
4. [Option ID = 2693]
Correct Answer :-
[Option ID = 2693]
[Question ID = 728]
1. [Option ID = 2910]
2. [Option ID = 2911]
3. [Option ID = 2909]
4. [Option ID = 2912]
48)
49)
50)
51)
Correct Answer :-
[Option ID = 2912]
[Question ID = 697]
1. III only [Option ID = 2788]
2. II only [Option ID = 2787]
3. I only [Option ID = 2785]
4. I, II and III [Option ID = 2786]
Correct Answer :-
I, II and III [Option ID = 2786]
[Question ID = 700]
1. [Option ID = 2798]
2. [Option ID = 2797]
3. [Option ID = 2800]
4. [Option ID = 2799]
Correct Answer :-
[Option ID = 2799]
[Question ID = 678]
1. Cr
2+
has a low cationic charge [Option ID = 2711]
2. F has -1 anionic charge and highly electronegative [Option ID = 2709]
3. Spin-orbit coupling in Cr
2+
[Option ID = 2712]
4. The Jahn-Teller effect [Option ID = 2710]
Correct Answer :-
The Jahn-Teller effect [Option ID = 2710]
[Question ID = 723]
1. [Option ID = 2889]
52)
53)
2. [Option ID = 2890]
3. [Option ID = 2891]
4. [Option ID = 2892]
Correct Answer :-
[Option ID = 2889]
[Question ID = 727]
1. [Option ID = 2907]
2. [Option ID = 2906]
3. [Option ID = 2905]
4. [Option ID = 2908]
Correct Answer :-
[Option ID = 2905]
[Question ID = 707]
54)
55)
56)
1. N9 [Option ID = 2828]
2. N7 [Option ID = 2827]
3. N1 [Option ID = 2825]
4. N3 [Option ID = 2826]
Correct Answer :-
N7 [Option ID = 2827]
[Question ID = 672]
1. Bicapped prism [Option ID = 2688]
2. Square pyramidal [Option ID = 2686]
3. Trigonal planar [Option ID = 2685]
4. Bent [Option ID = 2687]
Correct Answer :-
Square pyramidal [Option ID = 2686]
[Question ID = 704]
1. [Option ID = 2816]
2. [Option ID = 2814]
3. [Option ID = 2813]
4. [Option ID = 2815]
Correct Answer :-
[Option ID = 2813]
57)
58)
[Question ID = 708]
1. [Option ID = 2829]
2. [Option ID = 2832]
3. [Option ID = 2831]
4. [Option ID = 2830]
Correct Answer :-
[Option ID = 2831]
[Question ID = 717]
1. [Option ID = 2866]
2. [Option ID = 2865]
3. [Option ID = 2867]
4. [Option ID = 2868]
Correct Answer :-
[Option ID = 2866]
59)
[Question ID = 711]
1. [Option ID = 2843]
2. [Option ID = 2842]
3. [Option ID = 2844]
4. [Option ID = 2841]
Correct Answer :-
[Option ID = 2842]
[Question ID = 710]
1. [Option ID = 2838]
2. [Option ID = 2839]
3. [Option ID = 2837]
4. [Option ID = 2840]
Correct Answer :-
60)
61)
62)
[Option ID = 2838]
[Question ID = 682]
1. 0.30 M [Option ID = 2728]
2. 0.25 M [Option ID = 2727]
3. 0.60 M [Option ID = 2725]
4. 0.10 M [Option ID = 2726]
Correct Answer :-
0.30 M [Option ID = 2728]
[Question ID = 772]
1. [Option ID = 3087]
2. [Option ID = 3088]
3. [Option ID = 3086]
4. [Option ID = 3085]
Correct Answer :-
[Option ID = 3086]
[Question ID = 733]
1. [Option ID = 2932]
63)
64)
65)
2. [Option ID = 2929]
3. [Option ID = 2930]
4. [Option ID = 2931]
Correct Answer :-
[Option ID = 2929]
[Question ID = 767]
1. 120 [Option ID = 3065]
2. 280 [Option ID = 3066]
3. 300 [Option ID = 3068]
4. 20 [Option ID = 3067]
Correct Answer :-
20 [Option ID = 3067]
[Question ID = 734]
1. [Option ID = 2936]
2. [Option ID = 2933]
3. [Option ID = 2934]
4. [Option ID = 2935]
Correct Answer :-
[Option ID = 2935]
[Question ID = 676]
66)
67)
68)
1. [Option ID = 2702]
2. [Option ID = 2703]
3. [Option ID = 2704]
4. [Option ID = 2701]
Correct Answer :-
[Option ID = 2703]
[Question ID = 729]
1. (2Z, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2914]
2. (2E, 4E)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2915]
3. (2E, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2916]
4. (2Z, 4E)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2913]
Correct Answer :-
(2E, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2916]
[Question ID = 765]
1. [Option ID = 3060]
2. [Option ID = 3057]
3. [Option ID = 3058]
4. [Option ID = 3059]
Correct Answer :-
[Option ID = 3059]
[Question ID = 724]
1. [Option ID = 2893]
69)
2. [Option ID = 2895]
3. [Option ID = 2896]
4. [Option ID = 2894]
Correct Answer :-
[Option ID = 2893]
[Question ID = 721]
1. [Option ID = 2881]
2. [Option ID = 2884]
3. [Option ID = 2882]
4. [Option ID = 2883]
Correct Answer :-
[Option ID = 2882]
70)
71)
72)
73)
[Question ID = 766]
1. 512 times [Option ID = 3064]
2. 256 times [Option ID = 3063]
3. 128 times [Option ID = 3062]
4. 64 times [Option ID = 3061]
Correct Answer :-
512 times [Option ID = 3064]
[Question ID = 670]
1. 2 [Option ID = 2678]
2. 5 [Option ID = 2680]
3. 1 [Option ID = 2677]
4. 3 [Option ID = 2679]
Correct Answer :-
5 [Option ID = 2680]
[Question ID = 731]
1. [Option ID = 2924]
2. [Option ID = 2923]
3. [Option ID = 2922]
4. [Option ID = 2921]
Correct Answer :-
[Option ID = 2922]
[Question ID = 690]
1. [Option ID = 2760]
2. [Option ID = 2759]
3. [Option ID = 2757]
4. [Option ID = 2758]
74)
75)
Correct Answer :-
[Option ID = 2758]
[Question ID = 720]
1. [Option ID = 2879]
2. [Option ID = 2878]
3. [Option ID = 2880]
4. [Option ID = 2877]
Correct Answer :-
[Option ID = 2877]
[Question ID = 722]
1. [Option ID = 2886]
2. [Option ID = 2888]
3. [Option ID = 2885]
4. [Option ID = 2887]
Correct Answer :-
76)
77)
78)
[Option ID = 2887]
[Question ID = 755]
1. [Option ID = 3019]
2. [Option ID = 3018]
3. [Option ID = 3020]
4. [Option ID = 3017]
Correct Answer :-
[Option ID = 3019]
[Question ID = 695]
1. Ba [Option ID = 2779]
2. BaO [Option ID = 2780]
3. BaOH [Option ID = 2778]
4. BaH
2
[Option ID = 2777]
Correct Answer :-
BaO [Option ID = 2780]
[Question ID = 703]
1. [Option ID = 2811]
2. [Option ID = 2809]
3. [Option ID = 2812]
4. [Option ID = 2810]
Correct Answer :-
[Option ID = 2811]
79)
80)
81)
82)
83)
[Option ID = 2810]
[Question ID = 732]
1. [Option ID = 2927]
2. [Option ID = 2928]
3. [Option ID = 2926]
4. [Option ID = 2925]
Correct Answer :-
[Option ID = 2926]
A monoatomic gas following Fermi-Dirac statistics begins to follow Maxwell-Boltzmann statistics at: [Question ID = 735]
1. Low Temperature and low density [Option ID = 2937]
2. High Temperature and high density [Option ID = 2940]
3. Low Temperature and high density [Option ID = 2938]
4. High Temperature and low density [Option ID = 2939]
Correct Answer :-
High Temperature and low density [Option ID = 2939]
The Dulong and Petit?s Law says that the molar heat capacity of elements is: [Question ID = 741]
1. [Option ID = 2964]
2. [Option ID = 2961]
3. [Option ID = 2963]
4. [Option ID = 2962]
Correct Answer :-
[Option ID = 2961]
What is the most common natural form in which fluorine is found on earth?
[Question ID = 684]
1. As a fluoride ion in various minerals [Option ID = 2735]
2. As weak acid HF (aq) [Option ID = 2734]
3. In various fluorocarbon compounds in the atmosphere. [Option ID = 2736]
4. As XeF
2
(s)
[Option ID = 2733]
Correct Answer :-
As a fluoride ion in various minerals [Option ID = 2735]
What is the correct form of Stirling?s approximation?
[Question ID = 738]
1. [Option ID = 2950]
2. [Option ID = 2951]
84)
85)
86)
87)
88)
3. [Option ID = 2949]
4. [Option ID = 2952]
Correct Answer :-
[Option ID = 2950]
What is the total energy of one mole of an ideal monoatomic gas in terms of Boltzmann?s Constant (k), Avogadro?s number (N) and
temperature (T)
[Question ID = 739]
1. 3 NkT [Option ID = 2953]
2. (3/2) NkT [Option ID = 2956]
3. (1/2) NkT [Option ID = 2955]
4. NkT [Option ID = 2954]
Correct Answer :-
(3/2) NkT [Option ID = 2956]
The following equation is associated with the relationship between the diffusion current and the concentration of the depolarizer
used in polarography: [Question ID = 753]
1. Debye-Huckel equation [Option ID = 3009]
2. Stern-Volmer equation [Option ID = 3010]
3. Nyquist equation [Option ID = 3012]
4. Ilkovic equation [Option ID = 3011]
Correct Answer :-
Ilkovic equation [Option ID = 3011]
Electronic transitions originating from the 1S energy level of the Hydrogen atom to higher levels belong to which series? [Question ID
= 747]
1. Lyman Series [Option ID = 2985]
2. Brackett Series [Option ID = 2987]
3. Balmer Series [Option ID = 2986]
4. Pfund Series [Option ID = 2988]
Correct Answer :-
Lyman Series [Option ID = 2985]
Which of the following reactions best classified as an oxidative addition? [Question ID = 701]
1. [Option ID = 2801]
2. [Option ID = 2803]
3. [Option ID = 2802]
4. [Option ID = 2804]
Correct Answer :-
[Option ID = 2804]
Which of the following is required for both paramagnetism and ferromagnetism? [Question ID = 698]
1. Super exchange [Option ID = 2791]
2. unpaired electrons [Option ID = 2792]
3. Low-spin electron configuration [Option ID = 2790]
4. Strong oxidizing conditions [Option ID = 2789]
Correct Answer :-
unpaired electrons [Option ID = 2792]
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
37)
38)
4. 3 [Option ID = 2753]
Correct Answer :-
1 [Option ID = 2755]
[Question ID = 718]
1. C) [Option ID = 2871]
2. B) [Option ID = 2870]
3. A) [Option ID = 2869]
4. D) both (B) and (C) [Option ID = 2872]
Correct Answer :-
A) [Option ID = 2869]
[Question ID = 709]
1. [Option ID = 2836]
2. [Option ID = 2833]
3. [Option ID = 2835]
4. [Option ID = 2834]
39)
40)
41)
42)
Correct Answer :-
[Option ID = 2836]
[Question ID = 705]
1. (2Z, 4Z)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2819]
2. (2E, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2817]
3. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2818]
4. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
Correct Answer :-
(2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
[Question ID = 680]
1. The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
2. Metal-EDTA complexes have an equilibrium concentration independent of pH [Option ID = 2718]
3. Metal-EDTA complexes are often 2:1 in stoichiometry [Option ID = 2717]
4. Metal-EDTA complexes are less stable than the corresponding metal-ammine complexes [Option ID = 2720]
Correct Answer :-
The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
[Question ID = 671]
1. 150 g [Option ID = 2682]
2. 300 g [Option ID = 2684]
3. 120 g [Option ID = 2681]
4. 180 g [Option ID = 2683]
Correct Answer :-
300 g [Option ID = 2684]
[Question ID = 756]
1. [Option ID = 3021]
2. [Option ID = 3022]
3. [Option ID = 3024]
4. [Option ID = 3023]
Correct Answer :-
43)
44)
45)
[Option ID = 3024]
[Question ID = 750]
1. [Option ID = 2999]
2. [Option ID = 3000]
3. [Option ID = 2997]
4. [Option ID = 2998]
Correct Answer :-
[Option ID = 2997]
[Question ID = 715]
1. [Option ID = 2857]
2. [Option ID = 2860]
3. [Option ID = 2858]
4. [Option ID = 2859]
Correct Answer :-
[Option ID = 2860]
46)
47)
[Question ID = 719]
1. [Option ID = 2873]
2. [Option ID = 2876]
3. [Option ID = 2874]
4. [Option ID = 2875]
Correct Answer :-
[Question ID = 674]
1. Evaporating some water to decrease the volume of the solution. [Option ID = 2696]
2. [Option ID = 2695]
3. [Option ID = 2694]
4. [Option ID = 2693]
Correct Answer :-
[Option ID = 2693]
[Question ID = 728]
1. [Option ID = 2910]
2. [Option ID = 2911]
3. [Option ID = 2909]
4. [Option ID = 2912]
48)
49)
50)
51)
Correct Answer :-
[Option ID = 2912]
[Question ID = 697]
1. III only [Option ID = 2788]
2. II only [Option ID = 2787]
3. I only [Option ID = 2785]
4. I, II and III [Option ID = 2786]
Correct Answer :-
I, II and III [Option ID = 2786]
[Question ID = 700]
1. [Option ID = 2798]
2. [Option ID = 2797]
3. [Option ID = 2800]
4. [Option ID = 2799]
Correct Answer :-
[Option ID = 2799]
[Question ID = 678]
1. Cr
2+
has a low cationic charge [Option ID = 2711]
2. F has -1 anionic charge and highly electronegative [Option ID = 2709]
3. Spin-orbit coupling in Cr
2+
[Option ID = 2712]
4. The Jahn-Teller effect [Option ID = 2710]
Correct Answer :-
The Jahn-Teller effect [Option ID = 2710]
[Question ID = 723]
1. [Option ID = 2889]
52)
53)
2. [Option ID = 2890]
3. [Option ID = 2891]
4. [Option ID = 2892]
Correct Answer :-
[Option ID = 2889]
[Question ID = 727]
1. [Option ID = 2907]
2. [Option ID = 2906]
3. [Option ID = 2905]
4. [Option ID = 2908]
Correct Answer :-
[Option ID = 2905]
[Question ID = 707]
54)
55)
56)
1. N9 [Option ID = 2828]
2. N7 [Option ID = 2827]
3. N1 [Option ID = 2825]
4. N3 [Option ID = 2826]
Correct Answer :-
N7 [Option ID = 2827]
[Question ID = 672]
1. Bicapped prism [Option ID = 2688]
2. Square pyramidal [Option ID = 2686]
3. Trigonal planar [Option ID = 2685]
4. Bent [Option ID = 2687]
Correct Answer :-
Square pyramidal [Option ID = 2686]
[Question ID = 704]
1. [Option ID = 2816]
2. [Option ID = 2814]
3. [Option ID = 2813]
4. [Option ID = 2815]
Correct Answer :-
[Option ID = 2813]
57)
58)
[Question ID = 708]
1. [Option ID = 2829]
2. [Option ID = 2832]
3. [Option ID = 2831]
4. [Option ID = 2830]
Correct Answer :-
[Option ID = 2831]
[Question ID = 717]
1. [Option ID = 2866]
2. [Option ID = 2865]
3. [Option ID = 2867]
4. [Option ID = 2868]
Correct Answer :-
[Option ID = 2866]
59)
[Question ID = 711]
1. [Option ID = 2843]
2. [Option ID = 2842]
3. [Option ID = 2844]
4. [Option ID = 2841]
Correct Answer :-
[Option ID = 2842]
[Question ID = 710]
1. [Option ID = 2838]
2. [Option ID = 2839]
3. [Option ID = 2837]
4. [Option ID = 2840]
Correct Answer :-
60)
61)
62)
[Option ID = 2838]
[Question ID = 682]
1. 0.30 M [Option ID = 2728]
2. 0.25 M [Option ID = 2727]
3. 0.60 M [Option ID = 2725]
4. 0.10 M [Option ID = 2726]
Correct Answer :-
0.30 M [Option ID = 2728]
[Question ID = 772]
1. [Option ID = 3087]
2. [Option ID = 3088]
3. [Option ID = 3086]
4. [Option ID = 3085]
Correct Answer :-
[Option ID = 3086]
[Question ID = 733]
1. [Option ID = 2932]
63)
64)
65)
2. [Option ID = 2929]
3. [Option ID = 2930]
4. [Option ID = 2931]
Correct Answer :-
[Option ID = 2929]
[Question ID = 767]
1. 120 [Option ID = 3065]
2. 280 [Option ID = 3066]
3. 300 [Option ID = 3068]
4. 20 [Option ID = 3067]
Correct Answer :-
20 [Option ID = 3067]
[Question ID = 734]
1. [Option ID = 2936]
2. [Option ID = 2933]
3. [Option ID = 2934]
4. [Option ID = 2935]
Correct Answer :-
[Option ID = 2935]
[Question ID = 676]
66)
67)
68)
1. [Option ID = 2702]
2. [Option ID = 2703]
3. [Option ID = 2704]
4. [Option ID = 2701]
Correct Answer :-
[Option ID = 2703]
[Question ID = 729]
1. (2Z, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2914]
2. (2E, 4E)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2915]
3. (2E, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2916]
4. (2Z, 4E)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2913]
Correct Answer :-
(2E, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2916]
[Question ID = 765]
1. [Option ID = 3060]
2. [Option ID = 3057]
3. [Option ID = 3058]
4. [Option ID = 3059]
Correct Answer :-
[Option ID = 3059]
[Question ID = 724]
1. [Option ID = 2893]
69)
2. [Option ID = 2895]
3. [Option ID = 2896]
4. [Option ID = 2894]
Correct Answer :-
[Option ID = 2893]
[Question ID = 721]
1. [Option ID = 2881]
2. [Option ID = 2884]
3. [Option ID = 2882]
4. [Option ID = 2883]
Correct Answer :-
[Option ID = 2882]
70)
71)
72)
73)
[Question ID = 766]
1. 512 times [Option ID = 3064]
2. 256 times [Option ID = 3063]
3. 128 times [Option ID = 3062]
4. 64 times [Option ID = 3061]
Correct Answer :-
512 times [Option ID = 3064]
[Question ID = 670]
1. 2 [Option ID = 2678]
2. 5 [Option ID = 2680]
3. 1 [Option ID = 2677]
4. 3 [Option ID = 2679]
Correct Answer :-
5 [Option ID = 2680]
[Question ID = 731]
1. [Option ID = 2924]
2. [Option ID = 2923]
3. [Option ID = 2922]
4. [Option ID = 2921]
Correct Answer :-
[Option ID = 2922]
[Question ID = 690]
1. [Option ID = 2760]
2. [Option ID = 2759]
3. [Option ID = 2757]
4. [Option ID = 2758]
74)
75)
Correct Answer :-
[Option ID = 2758]
[Question ID = 720]
1. [Option ID = 2879]
2. [Option ID = 2878]
3. [Option ID = 2880]
4. [Option ID = 2877]
Correct Answer :-
[Option ID = 2877]
[Question ID = 722]
1. [Option ID = 2886]
2. [Option ID = 2888]
3. [Option ID = 2885]
4. [Option ID = 2887]
Correct Answer :-
76)
77)
78)
[Option ID = 2887]
[Question ID = 755]
1. [Option ID = 3019]
2. [Option ID = 3018]
3. [Option ID = 3020]
4. [Option ID = 3017]
Correct Answer :-
[Option ID = 3019]
[Question ID = 695]
1. Ba [Option ID = 2779]
2. BaO [Option ID = 2780]
3. BaOH [Option ID = 2778]
4. BaH
2
[Option ID = 2777]
Correct Answer :-
BaO [Option ID = 2780]
[Question ID = 703]
1. [Option ID = 2811]
2. [Option ID = 2809]
3. [Option ID = 2812]
4. [Option ID = 2810]
Correct Answer :-
[Option ID = 2811]
79)
80)
81)
82)
83)
[Option ID = 2810]
[Question ID = 732]
1. [Option ID = 2927]
2. [Option ID = 2928]
3. [Option ID = 2926]
4. [Option ID = 2925]
Correct Answer :-
[Option ID = 2926]
A monoatomic gas following Fermi-Dirac statistics begins to follow Maxwell-Boltzmann statistics at: [Question ID = 735]
1. Low Temperature and low density [Option ID = 2937]
2. High Temperature and high density [Option ID = 2940]
3. Low Temperature and high density [Option ID = 2938]
4. High Temperature and low density [Option ID = 2939]
Correct Answer :-
High Temperature and low density [Option ID = 2939]
The Dulong and Petit?s Law says that the molar heat capacity of elements is: [Question ID = 741]
1. [Option ID = 2964]
2. [Option ID = 2961]
3. [Option ID = 2963]
4. [Option ID = 2962]
Correct Answer :-
[Option ID = 2961]
What is the most common natural form in which fluorine is found on earth?
[Question ID = 684]
1. As a fluoride ion in various minerals [Option ID = 2735]
2. As weak acid HF (aq) [Option ID = 2734]
3. In various fluorocarbon compounds in the atmosphere. [Option ID = 2736]
4. As XeF
2
(s)
[Option ID = 2733]
Correct Answer :-
As a fluoride ion in various minerals [Option ID = 2735]
What is the correct form of Stirling?s approximation?
[Question ID = 738]
1. [Option ID = 2950]
2. [Option ID = 2951]
84)
85)
86)
87)
88)
3. [Option ID = 2949]
4. [Option ID = 2952]
Correct Answer :-
[Option ID = 2950]
What is the total energy of one mole of an ideal monoatomic gas in terms of Boltzmann?s Constant (k), Avogadro?s number (N) and
temperature (T)
[Question ID = 739]
1. 3 NkT [Option ID = 2953]
2. (3/2) NkT [Option ID = 2956]
3. (1/2) NkT [Option ID = 2955]
4. NkT [Option ID = 2954]
Correct Answer :-
(3/2) NkT [Option ID = 2956]
The following equation is associated with the relationship between the diffusion current and the concentration of the depolarizer
used in polarography: [Question ID = 753]
1. Debye-Huckel equation [Option ID = 3009]
2. Stern-Volmer equation [Option ID = 3010]
3. Nyquist equation [Option ID = 3012]
4. Ilkovic equation [Option ID = 3011]
Correct Answer :-
Ilkovic equation [Option ID = 3011]
Electronic transitions originating from the 1S energy level of the Hydrogen atom to higher levels belong to which series? [Question ID
= 747]
1. Lyman Series [Option ID = 2985]
2. Brackett Series [Option ID = 2987]
3. Balmer Series [Option ID = 2986]
4. Pfund Series [Option ID = 2988]
Correct Answer :-
Lyman Series [Option ID = 2985]
Which of the following reactions best classified as an oxidative addition? [Question ID = 701]
1. [Option ID = 2801]
2. [Option ID = 2803]
3. [Option ID = 2802]
4. [Option ID = 2804]
Correct Answer :-
[Option ID = 2804]
Which of the following is required for both paramagnetism and ferromagnetism? [Question ID = 698]
1. Super exchange [Option ID = 2791]
2. unpaired electrons [Option ID = 2792]
3. Low-spin electron configuration [Option ID = 2790]
4. Strong oxidizing conditions [Option ID = 2789]
Correct Answer :-
unpaired electrons [Option ID = 2792]
89)
90)
91)
92)
93)
94)
Which of the following experimental techniques is not used to determine the average molecular weight of a polymer? [Question ID =
760]
1. Transmission electron microscopy [Option ID = 3039]
2. Equilibrium sedimentation [Option ID = 3038]
3. Intrinsic viscosity measurement [Option ID = 3040]
4. Dynamic light scattering [Option ID = 3037]
Correct Answer :-
Transmission electron microscopy [Option ID = 3039]
Which of the following is NOT a known relatively stable compound of uranium? [Question ID = 687]
1. [Option ID = 2745]
2. [Option ID = 2748]
3. [Option ID = 2747]
4. [Option ID = 2746]
Correct Answer :-
[Option ID = 2746]
Which of the following compounds exist in stereoisomeric form? [Question ID = 681]
1. [Option ID = 2721]
2. [Option ID = 2724]
3. [Option ID = 2722]
4. [Option ID = 2723]
Correct Answer :-
[Option ID = 2724]
Which of the following statement is not true? [Question ID = 745]
1. Methane is a spherical top molecule [Option ID = 2978]
2. Chloroform is a symmetric top molecule [Option ID = 2980]
3. Vinyl chloride is a symmetric top molecule [Option ID = 2979]
4. Water is an asymmetric top molecule [Option ID = 2977]
Correct Answer :-
Vinyl chloride is a symmetric top molecule [Option ID = 2979]
Which of the following is a n-type semiconductor? [Question ID = 696]
1. Silicon carbide [Option ID = 2784]
2. Silicon [Option ID = 2781]
3. Arsenic doped silicon [Option ID = 2783]
4. Gallium doped silicon [Option ID = 2782]
Correct Answer :-
Arsenic doped silicon [Option ID = 2783]
Which of the statement is not true? [Question ID = 746]
1. Franck Condon Principle states that during electronic transition the internuclear distance of a molecule does not change [Option ID = 2983]
2. The intensity of a fundamental vibrational transition is higher than that of a first overtone transition. [Option ID = 2984]
3. Morse equation represents the energy expression of a simple harmonic oscillator [Option ID = 2982]
4. The energy spacing between various vibrational levels are the same in a simple harmonic oscillator [Option ID = 2981]
Correct Answer :-
Franck Condon Principle states that during electronic transition the internuclear distance of a molecule does not change [Option ID = 2983]
FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU PhD in Chemistry
Topic:- DU_J18_PHD_CHEM
Which of the following statements about sulfur dioxide is true?
[Question ID = 677]
1. It forms a S-S dimer in condensed phase [Option ID = 2707]
2. Its anhydride of sulfuric acid [Option ID = 2706]
3. Its O-S-O angle is 180
0
[Option ID = 2708]
4. It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
Which of the following is a strong acid in pure liquid HF
[Question ID = 683]
1. H
2
O [Option ID = 2731]
2. NaF [Option ID = 2729]
3. CH
3
COOH [Option ID = 2730]
4. SbF
5
[Option ID = 2732]
Correct Answer :-
SbF
5
[Option ID = 2732]
Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
1. [Option ID = 2716]
2. [Option ID = 2714]
3. [Option ID = 2713]
4. [Option ID = 2715]
Correct Answer :-
[Option ID = 2714]
What is correct about h-index?
[Question ID = 758]
1. Alternative of impact factor [Option ID = 3031]
2. Based on most quoted papers [Option ID = 3030]
3. Quantify scientific productivity [Option ID = 3029]
4. All of these [Option ID = 3032]
Correct Answer :-
All of these [Option ID = 3032]
The hyperfine electron spin resonance (e.s.r.) spectrum of the benzene radical has how many lines? [Question ID = 748]
1. 12 [Option ID = 2992]
2. 7 [Option ID = 2990]
3. 1 [Option ID = 2991]
4. 6 [Option ID = 2989]
Correct Answer :-
7 [Option ID = 2990]
6)
7)
8)
9)
10)
11)
12)
The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic
spectrum? [Question ID = 742]
1. Ultraviolet and Visible region [Option ID = 2967]
2. X-ray region [Option ID = 2968]
3. Radiofrequency region [Option ID = 2966]
4. Infra-red region [Option ID = 2965]
Correct Answer :-
X-ray region [Option ID = 2968]
Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
1. 99:1.1 [Option ID = 2903]
2. 1.1:99 [Option ID = 2904]
3. 9:01 [Option ID = 2901]
4. 1:9 [Option ID = 2902]
Correct Answer :-
9:01 [Option ID = 2901]
Cobalt-60 is used in radiation therapy of cancer and can be produced by the bombardment of Cobalt-59 with [Question ID = 692]
1. Alpha particles [Option ID = 2765]
2. Beta particles [Option ID = 2767]
3. Neutrons [Option ID = 2766]
4. Gamma rays [Option ID = 2768]
Correct Answer :-
Neutrons [Option ID = 2766]
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the
reaction of the cell is- [Question ID = 763]
1. [Option ID = 3051]
2. [Option ID = 3052]
3. [Option ID = 3049]
4. [Option ID = 3050]
Correct Answer :-
[Option ID = 3052]
A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID =
685]
1. Conjugation throughout the polymeric chain. [Option ID = 2740]
2. A high degree of cross linking [Option ID = 2738]
3. A very low glass transition temperature [Option ID = 2737]
4. Presence of stereogenic centers of the same configuration [Option ID = 2739]
Correct Answer :-
Conjugation throughout the polymeric chain. [Option ID = 2740]
Impact factor is [Question ID = 768]
1. Ratio between citations and recent citable items publish [Option ID = 3071]
2. All of these [Option ID = 3072]
3. Addition of citations and recent citable items publish [Option ID = 3069]
4. Ratio between recent citable items publish and citations [Option ID = 3070]
Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
13)
14)
15)
16)
17)
1. [Option ID = 2770]
2. [Option ID = 2772]
3. [Option ID = 2771]
4. [Option ID = 2769]
Correct Answer :-
[Option ID = 2769]
How many diastereoisomers are possible for the compound 2, 4 ?diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
1. 6 [Option ID = 2899]
2. 5 [Option ID = 2898]
3. 8 [Option ID = 2900]
4. 4 [Option ID = 2897]
Correct Answer :-
5 [Option ID = 2898]
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
1. increase in ionic mobility of ions [Option ID = 3055]
2. increase in number of ions [Option ID = 3054]
3. 100% ionization of electrolyte at normal dilution [Option ID = 3056]
4. increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
increase in ionic mobility of ions [Option ID = 3055]
The solid state structures of the principal allotropes of elemental boron are made up of which of the following structural units
[Question ID = 699]
1. [Option ID = 2796]
2. [Option ID = 2795]
3. [Option ID = 2794]
4. [Option ID = 2793]
Correct Answer :-
[Option ID = 2793]
The molecular geometry of thionyl chloride is best described as [Question ID = 688]
1. T-shaped [Option ID = 2752]
2. Tetrahedral [Option ID = 2751]
3. Trigonal pyramidal [Option ID = 2749]
4. Trigonal planar [Option ID = 2750]
Correct Answer :-
Trigonal pyramidal [Option ID = 2749]
In a face-center cubic (FCC) type of crystal lattice, the number of atoms belonging exclusively to each unit cell within the lattice
is/are: [Question ID = 754]
1. 2 [Option ID = 3014]
2. 1 [Option ID = 3013]
3. 3 [Option ID = 3015]
4. 4 [Option ID = 3016]
Correct Answer :-
4 [Option ID = 3016]
18)
19)
20)
21)
22)
23)
24)
Among the following, the weakest oxidizing agent is [Question ID = 675]
1. Mg (s) [Option ID = 2698]
2. [Option ID = 2699]
3. [Option ID = 2700]
4. [Option ID = 2697]
Correct Answer :-
Mg (s) [Option ID = 2698]
For a polymer, which of the following statement/s is/are true? [Question ID = 759]
1. Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
2. Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
3. All of these [Option ID = 3036]
4. Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
Quantum dots are [Question ID = 762]
1. Three dimensional [Option ID = 3048]
2. One dimensional [Option ID = 3046]
3. Two dimensional [Option ID = 3047]
4. Zero dimensional [Option ID = 3045]
Correct Answer :-
Zero dimensional [Option ID = 3045]
The unit of rate constant for a third order reaction is: [Question ID = 749]
1. [Option ID = 2993]
2. [Option ID = 2995]
3. [Option ID = 2996]
4. [Option ID = 2994]
Correct Answer :-
[Option ID = 2996]
All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
1. Pb [Option ID = 2690]
2. O [Option ID = 2689]
3. Sn [Option ID = 2691]
4. No [Option ID = 2692]
Correct Answer :-
No [Option ID = 2692]
The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
1. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
2. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
3. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
4. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
Correct Answer :-
Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
In the kinetic theory of collisions, the SI unit of collision number, in terms of m (meter) and s (second), is:
[Question ID = 761]
25)
26)
27)
28)
29)
1. m-
2
s
-1
[Option ID = 3042]
2. m
4
s
-1
[Option ID = 3041]
3. m
2
s
-1
[Option ID = 3043]
4. None of these [Option ID = 3044]
Correct Answer :-
None of these [Option ID = 3044]
Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
1. [Option ID = 2824]
2. [Option ID = 2821]
3. [Option ID = 2823]
4. [Option ID = 2822]
Correct Answer :-
[Option ID = 2822]
The carbon monoxide molecule has an internuclear distance of 1.13 Angstroms. What is the moment of Inertia of this molecule?
[Question ID = 740]
1. [Option ID = 2960]
2. [Option ID = 2957]
3. [Option ID = 2958]
4. [Option ID = 2959]
Correct Answer :-
[Option ID = 2957]
Which of the following represent/s non-linear optical technique? [Question ID = 744]
1. Second Harmonic generation [Option ID = 2974]
2. Two-photon photoluminescence [Option ID = 2975]
3. Four-wave mixing [Option ID = 2973]
4. All of these [Option ID = 2976]
Correct Answer :-
All of these [Option ID = 2976]
. Which of the following does not affect the intensity of spectral lines of a sample? [Question ID = 743]
1. Path length of a sample [Option ID = 2972]
2. Population of energy states [Option ID = 2970]
3. Heisenberg?s Uncertainty principle [Option ID = 2971]
4. Concentration of a sample [Option ID = 2969]
Correct Answer :-
Heisenberg?s Uncertainty principle [Option ID = 2971]
[Question ID = 716]
30)
31)
1. [Option ID = 2862]
2. [Option ID = 2863]
3. [Option ID = 2861]
4. [Option ID = 2864]
Correct Answer :-
[Option ID = 2864]
[Question ID = 712]
1. [Option ID = 2845]
2. [Option ID = 2846]
3. [Option ID = 2848]
4. [Option ID = 2847]
Correct Answer :-
[Option ID = 2847]
[Question ID = 686]
1. [Option ID = 2743]
2. [Option ID = 2742]
3. [Option ID = 2741]
32)
33)
4. [Option ID = 2744]
Correct Answer :-
[Option ID = 2743]
[Question ID = 5633]
1. [Option ID = 22523]
2. [Option ID = 22524]
3. [Option ID = 22526]
4. [Option ID = 22525]
Correct Answer :-
[Option ID = 22523]
[Question ID = 730]
1. [Option ID = 2918]
2. [Option ID = 2920]
3. [Option ID = 2917]
4. [Option ID = 2919]
Correct Answer :-
34)
35)
36)
[Option ID = 2919]
[Question ID = 714]
1. [Option ID = 2856]
2. [Option ID = 2853]
3. [Option ID = 2855]
4. [Option ID = 2854]
Correct Answer :-
[Option ID = 2854]
[Question ID = 669]
1. 2 [Option ID = 2673]
2. 18 [Option ID = 2676]
3. 5 [Option ID = 2674]
4. 10 [Option ID = 2675]
Correct Answer :-
5 [Option ID = 2674]
[Question ID = 689]
1. 2 [Option ID = 2754]
2. 0 [Option ID = 2756]
3. 1 [Option ID = 2755]
37)
38)
4. 3 [Option ID = 2753]
Correct Answer :-
1 [Option ID = 2755]
[Question ID = 718]
1. C) [Option ID = 2871]
2. B) [Option ID = 2870]
3. A) [Option ID = 2869]
4. D) both (B) and (C) [Option ID = 2872]
Correct Answer :-
A) [Option ID = 2869]
[Question ID = 709]
1. [Option ID = 2836]
2. [Option ID = 2833]
3. [Option ID = 2835]
4. [Option ID = 2834]
39)
40)
41)
42)
Correct Answer :-
[Option ID = 2836]
[Question ID = 705]
1. (2Z, 4Z)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2819]
2. (2E, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2817]
3. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2818]
4. (2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
Correct Answer :-
(2Z, 4E)-3-chlorohexa-2, 4-diene-1,6-diol. [Option ID = 2820]
[Question ID = 680]
1. The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
2. Metal-EDTA complexes have an equilibrium concentration independent of pH [Option ID = 2718]
3. Metal-EDTA complexes are often 2:1 in stoichiometry [Option ID = 2717]
4. Metal-EDTA complexes are less stable than the corresponding metal-ammine complexes [Option ID = 2720]
Correct Answer :-
The presence of other complexing ligands in solution affects the equilibrium concentration of metal-EDTA complexes [Option ID = 2719]
[Question ID = 671]
1. 150 g [Option ID = 2682]
2. 300 g [Option ID = 2684]
3. 120 g [Option ID = 2681]
4. 180 g [Option ID = 2683]
Correct Answer :-
300 g [Option ID = 2684]
[Question ID = 756]
1. [Option ID = 3021]
2. [Option ID = 3022]
3. [Option ID = 3024]
4. [Option ID = 3023]
Correct Answer :-
43)
44)
45)
[Option ID = 3024]
[Question ID = 750]
1. [Option ID = 2999]
2. [Option ID = 3000]
3. [Option ID = 2997]
4. [Option ID = 2998]
Correct Answer :-
[Option ID = 2997]
[Question ID = 715]
1. [Option ID = 2857]
2. [Option ID = 2860]
3. [Option ID = 2858]
4. [Option ID = 2859]
Correct Answer :-
[Option ID = 2860]
46)
47)
[Question ID = 719]
1. [Option ID = 2873]
2. [Option ID = 2876]
3. [Option ID = 2874]
4. [Option ID = 2875]
Correct Answer :-
[Question ID = 674]
1. Evaporating some water to decrease the volume of the solution. [Option ID = 2696]
2. [Option ID = 2695]
3. [Option ID = 2694]
4. [Option ID = 2693]
Correct Answer :-
[Option ID = 2693]
[Question ID = 728]
1. [Option ID = 2910]
2. [Option ID = 2911]
3. [Option ID = 2909]
4. [Option ID = 2912]
48)
49)
50)
51)
Correct Answer :-
[Option ID = 2912]
[Question ID = 697]
1. III only [Option ID = 2788]
2. II only [Option ID = 2787]
3. I only [Option ID = 2785]
4. I, II and III [Option ID = 2786]
Correct Answer :-
I, II and III [Option ID = 2786]
[Question ID = 700]
1. [Option ID = 2798]
2. [Option ID = 2797]
3. [Option ID = 2800]
4. [Option ID = 2799]
Correct Answer :-
[Option ID = 2799]
[Question ID = 678]
1. Cr
2+
has a low cationic charge [Option ID = 2711]
2. F has -1 anionic charge and highly electronegative [Option ID = 2709]
3. Spin-orbit coupling in Cr
2+
[Option ID = 2712]
4. The Jahn-Teller effect [Option ID = 2710]
Correct Answer :-
The Jahn-Teller effect [Option ID = 2710]
[Question ID = 723]
1. [Option ID = 2889]
52)
53)
2. [Option ID = 2890]
3. [Option ID = 2891]
4. [Option ID = 2892]
Correct Answer :-
[Option ID = 2889]
[Question ID = 727]
1. [Option ID = 2907]
2. [Option ID = 2906]
3. [Option ID = 2905]
4. [Option ID = 2908]
Correct Answer :-
[Option ID = 2905]
[Question ID = 707]
54)
55)
56)
1. N9 [Option ID = 2828]
2. N7 [Option ID = 2827]
3. N1 [Option ID = 2825]
4. N3 [Option ID = 2826]
Correct Answer :-
N7 [Option ID = 2827]
[Question ID = 672]
1. Bicapped prism [Option ID = 2688]
2. Square pyramidal [Option ID = 2686]
3. Trigonal planar [Option ID = 2685]
4. Bent [Option ID = 2687]
Correct Answer :-
Square pyramidal [Option ID = 2686]
[Question ID = 704]
1. [Option ID = 2816]
2. [Option ID = 2814]
3. [Option ID = 2813]
4. [Option ID = 2815]
Correct Answer :-
[Option ID = 2813]
57)
58)
[Question ID = 708]
1. [Option ID = 2829]
2. [Option ID = 2832]
3. [Option ID = 2831]
4. [Option ID = 2830]
Correct Answer :-
[Option ID = 2831]
[Question ID = 717]
1. [Option ID = 2866]
2. [Option ID = 2865]
3. [Option ID = 2867]
4. [Option ID = 2868]
Correct Answer :-
[Option ID = 2866]
59)
[Question ID = 711]
1. [Option ID = 2843]
2. [Option ID = 2842]
3. [Option ID = 2844]
4. [Option ID = 2841]
Correct Answer :-
[Option ID = 2842]
[Question ID = 710]
1. [Option ID = 2838]
2. [Option ID = 2839]
3. [Option ID = 2837]
4. [Option ID = 2840]
Correct Answer :-
60)
61)
62)
[Option ID = 2838]
[Question ID = 682]
1. 0.30 M [Option ID = 2728]
2. 0.25 M [Option ID = 2727]
3. 0.60 M [Option ID = 2725]
4. 0.10 M [Option ID = 2726]
Correct Answer :-
0.30 M [Option ID = 2728]
[Question ID = 772]
1. [Option ID = 3087]
2. [Option ID = 3088]
3. [Option ID = 3086]
4. [Option ID = 3085]
Correct Answer :-
[Option ID = 3086]
[Question ID = 733]
1. [Option ID = 2932]
63)
64)
65)
2. [Option ID = 2929]
3. [Option ID = 2930]
4. [Option ID = 2931]
Correct Answer :-
[Option ID = 2929]
[Question ID = 767]
1. 120 [Option ID = 3065]
2. 280 [Option ID = 3066]
3. 300 [Option ID = 3068]
4. 20 [Option ID = 3067]
Correct Answer :-
20 [Option ID = 3067]
[Question ID = 734]
1. [Option ID = 2936]
2. [Option ID = 2933]
3. [Option ID = 2934]
4. [Option ID = 2935]
Correct Answer :-
[Option ID = 2935]
[Question ID = 676]
66)
67)
68)
1. [Option ID = 2702]
2. [Option ID = 2703]
3. [Option ID = 2704]
4. [Option ID = 2701]
Correct Answer :-
[Option ID = 2703]
[Question ID = 729]
1. (2Z, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2914]
2. (2E, 4E)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2915]
3. (2E, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2916]
4. (2Z, 4E)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2913]
Correct Answer :-
(2E, 4Z)-3, 4-dibromo hepta-2, 4-diene [Option ID = 2916]
[Question ID = 765]
1. [Option ID = 3060]
2. [Option ID = 3057]
3. [Option ID = 3058]
4. [Option ID = 3059]
Correct Answer :-
[Option ID = 3059]
[Question ID = 724]
1. [Option ID = 2893]
69)
2. [Option ID = 2895]
3. [Option ID = 2896]
4. [Option ID = 2894]
Correct Answer :-
[Option ID = 2893]
[Question ID = 721]
1. [Option ID = 2881]
2. [Option ID = 2884]
3. [Option ID = 2882]
4. [Option ID = 2883]
Correct Answer :-
[Option ID = 2882]
70)
71)
72)
73)
[Question ID = 766]
1. 512 times [Option ID = 3064]
2. 256 times [Option ID = 3063]
3. 128 times [Option ID = 3062]
4. 64 times [Option ID = 3061]
Correct Answer :-
512 times [Option ID = 3064]
[Question ID = 670]
1. 2 [Option ID = 2678]
2. 5 [Option ID = 2680]
3. 1 [Option ID = 2677]
4. 3 [Option ID = 2679]
Correct Answer :-
5 [Option ID = 2680]
[Question ID = 731]
1. [Option ID = 2924]
2. [Option ID = 2923]
3. [Option ID = 2922]
4. [Option ID = 2921]
Correct Answer :-
[Option ID = 2922]
[Question ID = 690]
1. [Option ID = 2760]
2. [Option ID = 2759]
3. [Option ID = 2757]
4. [Option ID = 2758]
74)
75)
Correct Answer :-
[Option ID = 2758]
[Question ID = 720]
1. [Option ID = 2879]
2. [Option ID = 2878]
3. [Option ID = 2880]
4. [Option ID = 2877]
Correct Answer :-
[Option ID = 2877]
[Question ID = 722]
1. [Option ID = 2886]
2. [Option ID = 2888]
3. [Option ID = 2885]
4. [Option ID = 2887]
Correct Answer :-
76)
77)
78)
[Option ID = 2887]
[Question ID = 755]
1. [Option ID = 3019]
2. [Option ID = 3018]
3. [Option ID = 3020]
4. [Option ID = 3017]
Correct Answer :-
[Option ID = 3019]
[Question ID = 695]
1. Ba [Option ID = 2779]
2. BaO [Option ID = 2780]
3. BaOH [Option ID = 2778]
4. BaH
2
[Option ID = 2777]
Correct Answer :-
BaO [Option ID = 2780]
[Question ID = 703]
1. [Option ID = 2811]
2. [Option ID = 2809]
3. [Option ID = 2812]
4. [Option ID = 2810]
Correct Answer :-
[Option ID = 2811]
79)
80)
81)
82)
83)
[Option ID = 2810]
[Question ID = 732]
1. [Option ID = 2927]
2. [Option ID = 2928]
3. [Option ID = 2926]
4. [Option ID = 2925]
Correct Answer :-
[Option ID = 2926]
A monoatomic gas following Fermi-Dirac statistics begins to follow Maxwell-Boltzmann statistics at: [Question ID = 735]
1. Low Temperature and low density [Option ID = 2937]
2. High Temperature and high density [Option ID = 2940]
3. Low Temperature and high density [Option ID = 2938]
4. High Temperature and low density [Option ID = 2939]
Correct Answer :-
High Temperature and low density [Option ID = 2939]
The Dulong and Petit?s Law says that the molar heat capacity of elements is: [Question ID = 741]
1. [Option ID = 2964]
2. [Option ID = 2961]
3. [Option ID = 2963]
4. [Option ID = 2962]
Correct Answer :-
[Option ID = 2961]
What is the most common natural form in which fluorine is found on earth?
[Question ID = 684]
1. As a fluoride ion in various minerals [Option ID = 2735]
2. As weak acid HF (aq) [Option ID = 2734]
3. In various fluorocarbon compounds in the atmosphere. [Option ID = 2736]
4. As XeF
2
(s)
[Option ID = 2733]
Correct Answer :-
As a fluoride ion in various minerals [Option ID = 2735]
What is the correct form of Stirling?s approximation?
[Question ID = 738]
1. [Option ID = 2950]
2. [Option ID = 2951]
84)
85)
86)
87)
88)
3. [Option ID = 2949]
4. [Option ID = 2952]
Correct Answer :-
[Option ID = 2950]
What is the total energy of one mole of an ideal monoatomic gas in terms of Boltzmann?s Constant (k), Avogadro?s number (N) and
temperature (T)
[Question ID = 739]
1. 3 NkT [Option ID = 2953]
2. (3/2) NkT [Option ID = 2956]
3. (1/2) NkT [Option ID = 2955]
4. NkT [Option ID = 2954]
Correct Answer :-
(3/2) NkT [Option ID = 2956]
The following equation is associated with the relationship between the diffusion current and the concentration of the depolarizer
used in polarography: [Question ID = 753]
1. Debye-Huckel equation [Option ID = 3009]
2. Stern-Volmer equation [Option ID = 3010]
3. Nyquist equation [Option ID = 3012]
4. Ilkovic equation [Option ID = 3011]
Correct Answer :-
Ilkovic equation [Option ID = 3011]
Electronic transitions originating from the 1S energy level of the Hydrogen atom to higher levels belong to which series? [Question ID
= 747]
1. Lyman Series [Option ID = 2985]
2. Brackett Series [Option ID = 2987]
3. Balmer Series [Option ID = 2986]
4. Pfund Series [Option ID = 2988]
Correct Answer :-
Lyman Series [Option ID = 2985]
Which of the following reactions best classified as an oxidative addition? [Question ID = 701]
1. [Option ID = 2801]
2. [Option ID = 2803]
3. [Option ID = 2802]
4. [Option ID = 2804]
Correct Answer :-
[Option ID = 2804]
Which of the following is required for both paramagnetism and ferromagnetism? [Question ID = 698]
1. Super exchange [Option ID = 2791]
2. unpaired electrons [Option ID = 2792]
3. Low-spin electron configuration [Option ID = 2790]
4. Strong oxidizing conditions [Option ID = 2789]
Correct Answer :-
unpaired electrons [Option ID = 2792]
89)
90)
91)
92)
93)
94)
Which of the following experimental techniques is not used to determine the average molecular weight of a polymer? [Question ID =
760]
1. Transmission electron microscopy [Option ID = 3039]
2. Equilibrium sedimentation [Option ID = 3038]
3. Intrinsic viscosity measurement [Option ID = 3040]
4. Dynamic light scattering [Option ID = 3037]
Correct Answer :-
Transmission electron microscopy [Option ID = 3039]
Which of the following is NOT a known relatively stable compound of uranium? [Question ID = 687]
1. [Option ID = 2745]
2. [Option ID = 2748]
3. [Option ID = 2747]
4. [Option ID = 2746]
Correct Answer :-
[Option ID = 2746]
Which of the following compounds exist in stereoisomeric form? [Question ID = 681]
1. [Option ID = 2721]
2. [Option ID = 2724]
3. [Option ID = 2722]
4. [Option ID = 2723]
Correct Answer :-
[Option ID = 2724]
Which of the following statement is not true? [Question ID = 745]
1. Methane is a spherical top molecule [Option ID = 2978]
2. Chloroform is a symmetric top molecule [Option ID = 2980]
3. Vinyl chloride is a symmetric top molecule [Option ID = 2979]
4. Water is an asymmetric top molecule [Option ID = 2977]
Correct Answer :-
Vinyl chloride is a symmetric top molecule [Option ID = 2979]
Which of the following is a n-type semiconductor? [Question ID = 696]
1. Silicon carbide [Option ID = 2784]
2. Silicon [Option ID = 2781]
3. Arsenic doped silicon [Option ID = 2783]
4. Gallium doped silicon [Option ID = 2782]
Correct Answer :-
Arsenic doped silicon [Option ID = 2783]
Which of the statement is not true? [Question ID = 746]
1. Franck Condon Principle states that during electronic transition the internuclear distance of a molecule does not change [Option ID = 2983]
2. The intensity of a fundamental vibrational transition is higher than that of a first overtone transition. [Option ID = 2984]
3. Morse equation represents the energy expression of a simple harmonic oscillator [Option ID = 2982]
4. The energy spacing between various vibrational levels are the same in a simple harmonic oscillator [Option ID = 2981]
Correct Answer :-
Franck Condon Principle states that during electronic transition the internuclear distance of a molecule does not change [Option ID = 2983]
95)
96)
97)
98)
99)
100)
Which of the statement is true? [Question ID = 752]
1. The mean ionic activity coefficients of aqueous NaCl solution and aqueous KBr solution, both at low concentrations, are independent of their respective
ionic strengths [Option ID = 3008]
2. The mean ionic activity coefficient of aqueous NaCl solution at low concentration decreases with increase in its ionic strength [Option ID = 3006]
3. The mean ionic activity coefficients of aqueous NaCl solution and aqueous KBr solution, both at low concentrations, vary differently upon increase of
their respective ionic strengths [Option ID = 3007]
4. The mean ionic activity coefficient of aqueous NaCl solution at low concentration increases with increase in its ionic strength [Option ID = 3005]
Correct Answer :-
The mean ionic activity coefficient of aqueous NaCl solution at low concentration decreases with increase in its ionic strength [Option ID = 3006]
The highest temperature that can be achieved due to a single normal mode of vibration in a solid crystal is known as: [Question ID =
757]
1. Debye Temperature [Option ID = 3026]
2. Theta Temperature [Option ID = 3027]
3. Curie Temperature [Option ID = 3025]
4. Flory Temperature [Option ID = 3028]
Correct Answer :-
Debye Temperature [Option ID = 3026]
Which is not a scientific site? [Question ID = 691]
1. Research Gate [Option ID = 2763]
2. Scopus [Option ID = 2761]
3. Web of Science [Option ID = 2762]
4. Google Plus [Option ID = 2764]
Correct Answer :-
Google Plus [Option ID = 2764]
According to the Michaelis Menten equation for unimolecular reactions: [Question ID = 751]
1. The rate is first order at low pressure, but becomes zero order at high pressure [Option ID = 3003]
2. The rate is zero order at both low and high pressures [Option ID = 3002]
3. The rate is zero order at low pressure, but becomes first order at high pressure [Option ID = 3004]
4. The rate is first order at both low and high pressures [Option ID = 3001]
Correct Answer :-
The rate is first order at low pressure, but becomes zero order at high pressure [Option ID = 3003]
The +1 oxidation state is more stable than +3 oxidation state for which of the following Group 13 element [Question ID = 694]
1. In [Option ID = 2775]
2. B [Option ID = 2773]
3. Al [Option ID = 2774]
4. Tl [Option ID = 2776]
Correct Answer :-
Tl [Option ID = 2776]
In how many ways can 10 distinguishable particles be placed in 3 boxes, so that there are 3 particles in first box, 5 in second and 2
in third? [Question ID = 737]
1. None of these [Option ID = 2948]
2. 1520 ways [Option ID = 2946]
3. 3260 ways [Option ID = 2947]
4. 2520 ways [Option ID = 2945]
Correct Answer :-
2520 ways [Option ID = 2945]
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This post was last modified on 29 January 2020