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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]
- It forms a S-S dimer in condensed phase [Option ID = 2707]
- Its anhydride of sulfuric acid [Option ID = 2706]
- Its O-S-O angle is 180° [Option ID = 2708]
- It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
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Correct Answer :-
It is a product of the combustion of fossil fuels that contain sulfur [Option ID = 2705]
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- Which of the following is a strong acid in pure liquid HF [Question ID = 683]
- H2O [Option ID = 2731]
- NaF [Option ID = 2729]
- CH3COOH [Option ID = 2730]
- SbF5 [Option ID = 2732]
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Correct Answer :-
• SbF5 [Option ID = 2732]
- Each of the following molecules can act as a chelating agent EXCEPT [Question ID = 679]
- HC(CH2CH2NH2)3 [Option ID = 2716]
- CH3NHCH2CH2CH3 [Option ID = 2714]
- N(CH2CH2NH2)3 [Option ID = 2713]
- H2NCH2CH2NH2 [Option ID = 2715]
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Correct Answer :-
CH3NHCH2CH2CH3 [Option ID = 2714]
- What is correct about h-index? [Question ID = 758]
- Alternative of impact factor [Option ID = 3031]
- Based on most quoted papers [Option ID = 3030]
- Quantify scientific productivity [Option ID = 3029]
- All of these [Option ID = 3032]
Correct Answer :-
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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]
- 12 [Option ID = 2992]
- 7 [Option ID = 2990]
- 1 [Option ID = 2991]
- 6 [Option ID = 2989]
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Correct Answer :-
7 [Option ID = 2990]
- The energy changes involving the core electrons of an atom or molecule are expressed in which region of the electromagnetic spectrum? [Question ID = 742]
- Ultraviolet and Visible region [Option ID = 2967]
- X-ray region [Option ID = 2968]
- Radiofrequency region [Option ID = 2966]
- Infra-red region [Option ID = 2965]
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Correct Answer :-
X-ray region [Option ID = 2968]
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- Find out the expected intensity ratio of M and M+1 signal for the Naphthalene molecular ion [Question ID = 726]
- 99:1.1 [Option ID = 2903]
- 1.1:99 [Option ID = 2904]
- 9:01 [Option ID = 2901]
- 1:9 [Option ID = 2902]
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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]
- Alpha particles [Option ID = 2765]
- Beta particles [Option ID = 2767]
- Neutrons [Option ID = 2766]
- Gamma rays [Option ID = 2768]
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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]
- 1015 [Option ID = 3051]
- 1030 [Option ID = 3052]
- 1025 [Option ID = 3049]
- 1020 [Option ID = 3050]
Correct Answer :-
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1030 [Option ID = 3052]
- A characteristic common to polymers that can be made to conduct electricity such as polyacetylene, polypyrrole is: [Question ID = 685]
- Conjugation throughout the polymeric chain. [Option ID = 2740]
- A high degree of cross linking [Option ID = 2738]
- A very low glass transition temperature [Option ID = 2737]
- Presence of stereogenic centers of the same configuration [Option ID = 2739]
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Correct Answer :-
• Conjugation throughout the polymeric chain. [Option ID = 2740]
- Impact factor is [Question ID = 768]
- Ratio between citations and recent citable items publish [Option ID = 3071]
- All of these [Option ID = 3072]
- Addition of citations and recent citable items publish [Option ID = 3069]
- Ratio between recent citable items publish and citations [Option ID = 3070]
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Correct Answer :-
Ratio between recent citable items publish and citations [Option ID = 3070]
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- On the basis of oxidation-reduction potential, which of the following is most likely to occur? [Question ID = 693]
- Al(s) + 3NaNO3 (aq) → 3Na(s) + Al(NO3)3 (aq) [Option ID = 2770]
- Ca(s) + 2NaNO3 (aq) → 2Na(s) + Ca(NO3)2 (aq) [Option ID = 2772]
- Pb(s) + 2LINO3 (aq) → 2Li (s) + Pb(NO3)2 (aq) [Option ID = 2771]
- Zn(s) + 2AgNO3 (aq) → 2Ag(s) + Zn(NO3)2 (aq) [Option ID = 2769]
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Correct Answer :-
Zn(s) + 2AgNO3 (aq) → 2Ag(s) + Zn(NO3)2 (aq) [Option ID = 2769]
- How many diastereoisomers are possible for the compound 2, 4-diphenylcyclobutane-1, 3 di carboxylic acids. [Question ID = 725]
- 6 [Option ID = 2899]
- 5 [Option ID = 2898]
- 8 [Option ID = 2900]
- 4 [Option ID = 2897]
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Correct Answer :-
5 [Option ID = 2898]
- An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to- [Question ID = 764]
- increase in ionic mobility of ions [Option ID = 3055]
- increase in number of ions [Option ID = 3054]
- 100% ionization of electrolyte at normal dilution [Option ID = 3056]
- increase in both i.e. number of ions and ionic mobility of ions. [Option ID = 3053]
Correct Answer :-
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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]
- B4 terahedra [Option ID = 2796]
- B6 octahedra [Option ID = 2795]
- B8 cubes [Option ID = 2794]
- B12 icosahedra [Option ID = 2793]
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Correct Answer :-
B12 icosahedra [Option ID = 2793]
- The molecular geometry of thionyl chloride is best described as [Question ID = 688]
- T-shaped [Option ID = 2752]
- Tetrahedral [Option ID = 2751]
- Trigonal pyramidal [Option ID = 2749]
- Trigonal planar [Option ID = 2750]
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Correct Answer :-
• Trigonal pyramidal [Option ID = 2749]
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- 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]
- 2 [Option ID = 3014]
- 1 [Option ID = 3013]
- 3 [Option ID = 3015]
- 4 [Option ID = 3016]
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Correct Answer :-
4 [Option ID = 3016]
- Among the following, the weakest oxidizing agent is [Question ID = 675]
- Mg (s) [Option ID = 2698]
- I2 (S) [Option ID = 2699]
- H+ (aq) [Option ID = 2700]
- MnO4 (aq) [Option ID = 2697]
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Correct Answer :-
Mg (s) [Option ID = 2698]
- For a polymer, which of the following statement/s is/are true? [Question ID = 759]
- Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
- Formation of a polypeptide from its monomers (amino acids) is an example of addition polymerization [Option ID = 3034]
- All of these [Option ID = 3036]
- Vinyl polymerization is an example of condensation polymerization. [Option ID = 3033]
Correct Answer :-
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Weight average molecular weight is almost always higher than the number average molecular weight [Option ID = 3035]
- Quantum dots are [Question ID = 762]
- Three dimensional [Option ID = 3048]
- One dimensional [Option ID = 3046]
- Two dimensional [Option ID = 3047]
- Zero dimensional [Option ID = 3045]
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Correct Answer :-
Zero dimensional [Option ID = 3045]
- The unit of rate constant for a third order reaction is: [Question ID = 749]
- s-1 [Option ID = 2993]
- mol-1 dm3 s-1 [Option ID = 2995]
- mol-2 dm6 s-1 [Option ID = 2996]
- mol dm-3 s-1 [Option ID = 2994]
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Correct Answer :-
mol-2 dm6 s-1 [Option ID = 2996]
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- All the following elements have at least one isotope that is not radioactive EXCEPT [Question ID = 673]
- Pb [Option ID = 2690]
- O [Option ID = 2689]
- Sn [Option ID = 2691]
- No [Option ID = 2692]
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Correct Answer :-
No [Option ID = 2692]
- The conditions for a species to follow Bose-Einstein statistics are; [Question ID = 736]
- Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 2944]
- Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 2943]
- Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 2941]
- Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 2942]
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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]
- m-2s-1 [Option ID = 3042]
- m4s-1 [Option ID = 3041]
- m2s-1 [Option ID = 3043]
- None of these [Option ID = 3044]
Correct Answer :-
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None of these [Option ID = 3044]
- Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 706]
- Both N(3) and C(6)NH2 are hydrogen bond donors. [Option ID = 2824]
- N(3) is a hydrogen bond acceptor and C(6)NH2 is a hydrogen bond donor. [Option ID = 2821]
- Both N(3) and C(6)NH2 are hydrogen bond acceptors [Option ID = 2823]
- N(1) is a hydrogen bond acceptor and C(6)NH2 is a hydrogen bond donor. [Option ID = 2822]
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Correct Answer :-
N(1) is a hydrogen bond acceptor and C(6)NH2 is a hydrogen bond donor. [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]
- 21.6 X 10-47 kgm2 [Option ID = 2960]
- 14.5 X 10-47 kgm2 [Option ID = 2957]
- 14.5 X 1047 kgm2 [Option ID = 2958]
- 1.45 X 10-47 kgm2 [Option ID = 2959]
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Correct Answer :-
14.5 X 10-47 kgm2 [Option ID = 2957]
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- Which of the following represent/s non-linear optical technique? [Question ID = 744]
- Second Harmonic generation [Option ID = 2974]
- Two-photon photoluminescence [Option ID = 2975]
- Four-wave mixing [Option ID = 2973]
- All of these [Option ID = 2976]
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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]
- Path length of a sample [Option ID = 2972]
- Population of energy states [Option ID = 2970]
- Heisenberg's Uncertainty principle [Option ID = 2971]
- Concentration of a sample [Option ID = 2969]
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Correct Answer :-
Heisenberg's Uncertainty principle [Option ID = 2971]
- Find out the major product of the following reaction [Question ID = 716]
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This download link is referred from the post: DUET Last 10 Years 2011-2021 Question Papers With Answer Key || Delhi University Entrance Test conducted by the NTA
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