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DU MSc Chemistry
Topic:- DU_J18_MSC_CHEM
- The halogen having metallic character is [Question ID = 790]
- Bromine [Option ID = 3159]
- Chlorine [Option ID = 3158]
- Iodine [Option ID = 3160]
- Fluorine [Option ID = 3157]
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Correct Answer :-
Iodine [Option ID = 3160]
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- If the density of air is 1.2 g/lit, what is the volume occupied by 7.8g of air? [Question ID = 860]
- 10.10lit [Option ID = 3440]
- 10 lit [Option ID = 3437]
- 6 lit [Option ID = 3438]
- 6.5 lit [Option ID = 3439]
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Correct Answer :-
6.5 lit [Option ID = 3439]
- Which of the following statement/s is/are true? [Question ID = 855]
- All of these [Option ID = 3420]
- Adsorption increases with increase in pressure [Option ID = 3419]
- Adsorption decreases with increase in temperature [Option ID = 3418]
- Adsorption is an exothermic process [Option ID = 3417]
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Correct Answer :-
All of these [Option ID = 3420]
- Which of the following species represent the example of dsp² hybridization? [Question ID = 53390]
- [FeF6]3- [Option ID = 93549]
- [Fe(CN)6]3- [Option ID = 93546]
- [Ni(CN)4]2- [Option ID = 93547]
- [Zn(NH3)4]2+ [Option ID = 93548]
Correct Answer :-
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[Ni(CN)4]2- [Option ID = 93547]
- Correct characteristics of the functional groups of adenine in DNA base pair are [Question ID = 824]
- Both N(3) and C(6)NH2 are hydrogen bond acceptors [Option ID = 3295]
- Both N(3) and C(6)NH2 are hydrogen bond acceptors. [Option ID = 3296]
- N(3) is a hydrogen bond acceptor and C(6)NH2 is a hydrogen bond donor. [Option ID = 3293]
- N(1) is a hydrogen bond acceptor and C(6)NH2 is a hydrogen bond donor. [Option ID = 3294]
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Correct Answer :-
N(1) is a hydrogen bond acceptor and C(6)NH2 is a hydrogen bond donor. [Option ID = 3294]
- Chemical potential is also known as [Question ID = 858]
- Partial molar entropy [Option ID = 3429]
- Partial molar Gibbs free energy [Option ID = 3431]
- None of these [Option ID = 3432]
- Partial molar enthalpy [Option ID = 3430]
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Correct Answer :-
Partial molar Gibbs free energy [Option ID = 3431]
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- From the following, which is more covalent? [Question ID = 781]
- Al2S3 [Option ID = 3122]
- AlN [Option ID = 3123]
- Al2Cl6 [Option ID = 3124]
- Al2O3 [Option ID = 3121]
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Correct Answer :-
Al2S3 [Option ID = 3122]
- The most probable candidate to form an octahedral complex is [Question ID = 792]
- d10 [Option ID = 3168]
- d8 (high spin) [Option ID = 3167]
- d6 (low spin) [Option ID = 3166]
- d1 (low spin) [Option ID = 3165]
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Correct Answer :-
d1 (low spin) [Option ID = 3165]
- Percentage of gold in 18 carat gold is [Question ID = 787]
- 18 [Option ID = 3145]
- 100 [Option ID = 3148]
- 75 [Option ID = 3146]
- 83.6 [Option ID = 3147]
Correct Answer :-
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75 [Option ID = 3146]
- Which pair from the following behaves as metalloid? [Question ID = 789]
- Al and Zn [Option ID = 3155]
- Rb and Cs [Option ID = 3156]
- Br and I [Option ID = 3153]
- Pt and I [Option ID = 3154]
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Correct Answer :-
Al and Zn [Option ID = 3155]
- For a substitution reaction following a dissociative mechanism, the rate determining step is [Question ID = 800]
- dependent on the solvent concentration [Option ID = 3199]
- dependent on the leaving group [Option ID = 3198]
- dependent on the entering group [Option ID = 3197]
- dependent on the nature of the complex [Option ID = 3200]
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Correct Answer :-
dependent on the leaving group [Option ID = 3198]
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- The amino acid constituents of artificial sweetener given below are: [Question ID = 826]
- L-Aspartic acid and L-tyrosine [Option ID = 3304]
- D-Glutamic acid and L-phenylgylcine [Option ID = 3301]
- L-Aspartic acid and L-phenylalanine [Option ID = 3303]
- L-Glutamic acid and L-phenylgylcine [Option ID = 3302]
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Correct Answer :-
L-Aspartic acid and L-phenylalanine [Option ID = 3303]
- In the following statements, which one is incorrect? [Question ID = 778]
- Atomic radius of Zr and Hf are same because of lanthanide contraction [Option ID = 3112]
- La(OH)3 is less basic than Lu(OH)3 [Option ID = 3109]
- La is actually an element of transition series rather than lanthanides [Option ID = 3111]
- In lanthanide series, ionic radius of Lu3+ ion decreases [Option ID = 3110]
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Correct Answer :-
La is actually an element of transition series rather than lanthanides [Option ID = 3111]
- In the dichromate dianion [Question ID = 791]
- 3 Cr-O bonds are equivalent [Option ID = 3163]
- 6 Cr-O bonds are equivalent [Option ID = 3162]
- All the Cr-O bonds are non-equivalent [Option ID = 3164]
- 4 Cr-O bonds are equivalent [Option ID = 3161]
Correct Answer :-
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6 Cr-O bonds are equivalent [Option ID = 3162]
- Vacuum is a measure of [Question ID = 804]
- Leaking rate of air [Option ID = 3214]
- Leaking rate of oil [Option ID = 3216]
- Leaking rate of moisture [Option ID = 3215]
- Emptiness [Option ID = 3213]
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Correct Answer :-
Leaking rate of air [Option ID = 3214]
- The Pre-exponential factor 'A' in the Arrhenius Equation depends on which of the following? [Question ID = 852]
- Collision Frequency [Option ID = 3407]
- Gibb's free energy of reaction [Option ID = 3406]
- None of these [Option ID = 3408]
- Energy of activation of the reaction [Option ID = 3405]
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Correct Answer :-
Collision Frequency [Option ID = 3407]
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- The process of heating the concentrated ore in a limited supply of air or in the absence of air is known as: [Question ID = 869]
- Roasting [Option ID = 3473]
- Calcination [Option ID = 3475]
- Cupellation [Option ID = 3476]
- Leaching [Option ID = 3474]
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Correct Answer :-
Calcination [Option ID = 3475]
- Spectroscopic transitions leading to rotation of molecules will appear at which region of the electromagnetic spectrum? [Question ID = 866]
- Ultraviolet [Option ID = 3461]
- Radiofrequency [Option ID = 3464]
- Infra-red [Option ID = 3463]
- Microwave [Option ID = 3462]
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Correct Answer :-
Microwave [Option ID = 3462]
- The ground state of a harmonic oscillator has number of nodes: [Question ID = 846]
- 2 [Option ID = 3382]
- 0 [Option ID = 3384]
- 1 [Option ID = 3383]
- 3 [Option ID = 3381]
Correct Answer :-
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0 [Option ID = 3384]
- Tritium is a radioisotope of hydrogen, it undergoes disintegration to give [Question ID = 786]
- α-particles [Option ID = 3142]
- β-particles [Option ID = 3143]
- Neutrons [Option ID = 3144]
- X-rays [Option ID = 3141]
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Correct Answer :-
Neutrons [Option ID = 3144]
- Which transitions are studied by UV spectrometer? [Question ID = 870]
- Electronic [Option ID = 3478]
- Vibrational [Option ID = 3480]
- Nuclear [Option ID = 3479]
- Rotational [Option ID = 3477]
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Correct Answer :-
Electronic [Option ID = 3478]
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- What happens during digestion of a precipitate? [Question ID = 801]
- Coalescence of smaller crystallites [Option ID = 3203]
- Recrystallization takes place [Option ID = 3202]
- Completion of precipitation [Option ID = 3201]
- rate of the reaction increases [Option ID = 3204]
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Correct Answer :-
Coalescence of smaller crystallites [Option ID = 3203]
- Among the following group of oxides, the group of oxides that cannot be reduced by carbon to give the respective metals is [Question ID = 788]
- CaO, K2O [Option ID = 3151]
- Fe2O3, ZnO [Option ID = 3150]
- PbO, Fe3O4 [Option ID = 3152]
- Cu2O, SnO2 [Option ID = 3149]
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Correct Answer :-
CaO, K2O [Option ID = 3151]
- In which of the following reaction migration of alkyl group from carbon to oxygen is observed? [Question ID = 813]
- Pinacol-pinacolone rearrangement [Option ID = 3249]
- Baeyer-villiger oxidation [Option ID = 3250]
- Prepration of phenol from cumene hydroperoxide [Option ID = 3251]
- Both Baeyer-villiger oxidation and Prepration of phenol from cumene hydroperoxide [Option ID = 3252]
Correct Answer :-
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Baeyer-villiger oxidation [Option ID = 3250]
- Alkali metals form highly stable complexes with [Question ID = 795]
- diethyl ether [Option ID = 3178]
- Butadiene [Option ID = 3180]
- Cryptand-222 [Option ID = 3177]
- Cyclopentadiene [Option ID = 3179]
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Correct Answer :-
Cryptand-222 [Option ID = 3177]
- The unit of rate constant for a second order reaction is: [Question ID = 850]
- S-1 [Option ID = 3397]
- mol-2 dm6 s-1 [Option ID = 3400]
- mol dm-3 s-1 [Option ID = 3398]
- mol-1 dm3 s-1 [Option ID = 3399]
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Correct Answer :-
mol-1 dm3 s-1 [Option ID = 3399]
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- What is the unit of specific resistance (or resistivity) of a conductor? [Question ID = 868]
- Ohmcm-1 [Option ID = 3471]
- Siemens-1 [Option ID = 3470]
- Ohm-1 cm [Option ID = 3472]
- Siemens-1 cm [Option ID = 3469]
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Correct Answer :-
Siemens-1 cm [Option ID = 3469]
- When a nucleophile encounters a ketone the site of attack is: [Question ID = 811]
- both the carbon and oxygen atoms, with equal probability [Option ID = 3243]
- the carbon atom of the carbonyl [Option ID = 3241]
- the oxygen atom of the carbonyl [Option ID = 3242]
- no attack occur as ketones do not react with nucleophiles [Option ID = 3244]
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Correct Answer :-
the carbon atom of the carbonyl [Option ID = 3241]
- In the cases of gases adsorbing on solid, which of the following statement/s is/are true? [Question ID = 845]
- Decrease in temperature of the system results in increase in adsorption [Option ID = 3378]
- Decrease in pressure of the system results in decrease in adsorption [Option ID = 3379]
- All of these [Option ID = 3380]
- Adsorption is an exothermic process [Option ID = 3377]
Correct Answer :-
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All of these [Option ID = 3380]
- During a disproportionation reaction, [Question ID = 802]
- Simultaneous oxidation and reduction of metal ion takes place [Option ID = 3207]
- Metal ion goes to lower oxidation state [Option ID = 3205]
- Metal ion goes to higher oxidation state [Option ID = 3206]
- Metal ion remains unchanged in its oxidation state [Option ID = 3208]
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Correct Answer :-
Simultaneous oxidation and reduction of metal ion takes place [Option ID = 3207]
- The number of independent modes of vibration in a linear molecule having N atoms is [Question ID = 851]
- 3N-6 [Option ID = 3402]
- 3N-3 [Option ID = 3404]
- 3N [Option ID = 3403]
- 3N-5 [Option ID = 3401]
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Correct Answer :-
3N-5 [Option ID = 3401]
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- A system that maintains a constant volume is known as [Question ID = 857]
- None of these [Option ID = 3428]
- Isochoric system [Option ID = 3425]
- Adiabatic system [Option ID = 3427]
- Isotactic system [Option ID = 3426]
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Correct Answer :-
Isochoric system [Option ID = 3425]
- Cobalt is present in [Question ID = 777]
- Vitamin B2 [Option ID = 3106]
- Vitamin B1 [Option ID = 3105]
- Vitamin B6 [Option ID = 3107]
- Vitamin B12 [Option ID = 3108]
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Correct Answer :-
Vitamin B12 [Option ID = 3108]
- In collision theory of bimolecular gaseous reactions, the Collision Frequency does not depend on: [Question ID = 849]
- Pressure of the system [Option ID = 3394]
- Number of molecules of each gas [Option ID = 3396]
- Temperature of the system [Option ID = 3393]
- Reduced mass of the system [Option ID = 3395]
Correct Answer :-
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Pressure of the system [Option ID = 3394]
- An inorganic mixture dissolves in hot conc. HCl giving a blue colored solution which on addition of water becomes pink. The mixture contains [Question ID = 793]
- Fe3+ [Option ID = 3172]
- Cr3+ [Option ID = 3171]
- Ni2+ [Option ID = 3169]
- Co2+ [Option ID = 3170]
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Correct Answer :-
Co2+ [Option ID = 3170]
- The Bragg's equation for crystallography can be written as: [Question ID = 844]
- ηλ = (2d / sin θ) [Option ID = 3375]
- ηλ= (2d sin θ) [Option ID = 3373]
- ηλ= (2/d) sin 2θ) [Option ID = 3374]
- ηλ= 1 / (2d sin θ) [Option ID = 3376]
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Correct Answer :-
ηλ= (2d sin θ) [Option ID = 3373]
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- The product X in the flowing reaction 6LiH+ 8BF3→ 6LiBF4 + X is [Question ID = 783]
- B4H10 [Option ID = 3129]
- B2H6 [Option ID = 3130]
- B3H8 [Option ID = 3132]
- BH3 [Option ID = 3131]
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Correct Answer :-
B2H6 [Option ID = 3130]
- The product obtained in the following conversion is:
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