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Delhi University Entrance Test (DUET) 2020 Previous Year Question Paper With Answer Key

This post was last modified on 27 December 2020

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Firstranke DURhD in Chemistry.

Topic:- CHEM PHD S2

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Parameter defining microcanonical, canonical and grand canonical ensembles are: [Question ID = 10022]
1. (N, V, T), (N, V, E) and (μ, V, Τ) [Option ID = 40082]
2. (N, V, E), (N, V, T) and (μ, V, Τ) [Option ID = 40083]
3. (Ν, V, Τ), (μ, V, T) and (N, V, E) [Option ID = 40084]
4. (μ, V, Τ), (N, V, T) and (N, V, E) [Option ID = 40085]
Correct Answer :- • (N, V, E), (N, V, T) and (μ, V, Τ) [Option ID = 40083]
What is Scifinder ? [Question ID = 10023]
1. World's largest database of chemistry literature [Option ID = 40086]
2. Country's largest database of chemistry literature [Option ID = 40087]
3. Continental's largest database of chemistry literature [Option ID = 40088]
4. India's largest database of chemistry literature [Option ID = 40089]
Correct Answer :- • World's largest database of chemistry literature [Option ID = 40086]
Match the shape to the formula. Which pairing is incorrect? [Question ID = 10024]
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1. [XeF5]; pentagonal planar [Option ID = 40090]
2. XeO3; trigonal planar [Option ID = 40091]
3. XeF4; square planar [Option ID = 40092]
4. [XeF3]+; T-shaped [Option ID = 40093]
Correct Answer :- • XeO3; trigonal planar [Option ID = 40091]
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Langmuir adsorption isotherm equation shows the variation of extent of adsorption as a function of: [Question ID = 10026]
1. Pressure [Option ID = 40098]
2. Temperature [Option ID = 40099]
3. pH of medium [Option ID = 40100]
Correct Answer :- • Pressure [Option ID = 40098]
Which statement is incorrect about XeF2, XeF4 and XeF6? [Question ID = 10027]
1. All three compounds react with silica glass at 298 K. [Option ID = 40102]
2. All three compounds can be sublimed under vacuum. [Option ID = 40103]
3. All three compounds are oxidizing agents. [Option ID = 40104]
4. All three compounds react with H2O. [Option ID = 40105]
Correct Answer :- • All three compounds react with silica glass at 298 K. [Option ID = 40102]
Green chemistry aims to? [Question ID = 10029]
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1. Design chemical products and process that maximize profits [Option ID = 40110]
2. Design safer chemical products and processes that reduce or eliminate the use and generation of hazardous substances [Option ID = 40111]
3. Design chemical products and processes that work most efficiently [Option ID = 40112]
4. Utilize non-renewable energy [Option ID = 40113]
Correct Answer :- • Design safer chemical products and processes that reduce or eliminate the use and generation of hazardous substances [Option ID = 40111]
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An aqueous solution containing a concentration of 2.5 x 10-8 OH- ions will have a pH of which of the following? [Question ID = 10030]
1. 6.40 [Option ID = 40114]
2. 6.42 [Option ID = 40115]
3. 7.40 [Option ID = 40116]
4. 7.76 [Option ID = 40117]
Correct Answer :- • 6.40 [Option ID = 40114]
An appropriate source to find out descriptive information is [Question ID = 10031]
1. Bibliography [Option ID = 40118]
2. Directory [Option ID = 40119]
3. Encyclopedia [Option ID = 40120]
Correct Answer :- • Encyclopedia [Option ID = 40120]
Which of the following statements regarding a conjugated system is false? [Question ID = 10032]
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1. Electrons are shared between more than two atoms, rather than being localized within bond joining two specific atoms [Option ID = 40122]
2. The molecule must be cyclic (ring-structured) [Option ID = 40123]
3. The molecule must feature alternating single and double bonds [Option ID = 40124]
4. The system arises from the overlap of neighboring p-orbital [Option ID = 40125]
Correct Answer :- • The molecule must be cyclic (ring-structured) [Option ID = 40123]
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The standard reduction potential Eº for half reactions are : Zn = Zn2+ + Ze E° = +0.76 V Fe = Fe2+ + Ze E° = + 0.41 V The EMF of the cell reaction Fe2+ + Zn = Zn2+ + Fe is : [Question ID = 10034]
1. +0.41 V [Option ID = 40130]
2. +0.76 V [Option ID = 40131]
3. +0.35 V [Option ID = 40132]
4. +1.17 V [Option ID = 40133]
Correct Answer :- • +0.76 V [Option ID = 40131]
The main purpose of research in education is to [Question ID = 10035]
1. Increase social status of an individual [Option ID = 40134]
2. Increase job prospects of an individual [Option ID = 40135]
3. Help in the personal growth of an individual [Option ID = 40136]
4. Help the candidate become an eminent educationist [Option ID = 40137]
Correct Answer :- • Help the candidate become an eminent educationist [Option ID = 40137]

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Spectroscopic transitions leading to the change in polarizibility ellipsoid of a molecule will appear at which region of the electromagnetic spectrum? [Question ID = 10036]
1. Microwave [Option ID = 40138]
2. Rotational [Option ID = 40139]
3. Infra-red [Option ID = 40140]
4. Raman [Option ID = 40141]
Correct Answer :- • Raman [Option ID = 40141]
What is the unit of cell constant of a conductor? [Question ID = 10038]
1. cm-1 [Option ID = 40146]
2. cm [Option ID = 40147]
3. Siemens [Option ID = 40148]
4. None of these [Option ID = 40149]
Correct Answer :- • cm-1 [Option ID = 40146]
In the process of conducting research 'Formulation of Hypothesis is followed by: [Question ID = 10039]
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1. Statement of Objectives [Option ID = 40150]
2. Analysis of Data [Option ID = 40151]
3. Selection of Research Tools [Option ID = 40152]
4. Collection of Data [Option ID = 40153]
Correct Answer :- • Selection of Research Tools [Option ID = 40152]
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A 10 cm³ of NaOH solution of pH 8 is mixed with 990 cm³ of water. What is the pH of the resulting solution? [Question ID = 10040]
1. 8 [Option ID = 40154]
2. 7 [Option ID = 40155]
3. 6 [Option ID = 40156]
4. Between 7 and 8 [Option ID = 40157]
Correct Answer :- • Between 7 and 8 [Option ID = 40157]
The heterocyclic ring present in the amino acid histidine is: [Question ID = 10041]
1. pyridine [Option ID = 40158]
2. pyrrole [Option ID = 40159]
3. indole [Option ID = 40160]
4. imidazole [Option ID = 40161]
Correct Answer :- • imidazole [Option ID = 40161]

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The essential qualities of a researcher are: [Question ID = 10042]
1. Spirit of free enquiry [Option ID = 40162]
2. Reliance on observation and evidence [Option ID = 40163]
3. Systematization or theorizing of knowledge [Option ID = 40164]
4. All of these [Option ID = 40165]
Correct Answer :- • All of these [Option ID = 40165]
The second-order rate constant (k2) for the reaction of I- with trans-[PtCl(CH3) (PEt3)2] in methanol at 30°C is 40 L.mol-1s-1 and with N³- is 7.0 L.mol-1s-¹. The given "Pt values are 5.42 and 3.58 for the two nucleophiles respectively. The value of nucleophilic discrimination constant (S) and the first-order rate constant (C) for the reaction could be: [Question ID = 10043]
1. 0.41, -0.61 [Option ID = 40166]
2. 0.41, -0.41 [Option ID = 40167]
3. 0.61, -0.41 [Option ID = 40168]
4. None of these [Option ID = 40169]
Correct Answer :- • 0.41, -0.61 [Option ID = 40166]
The ratio of the relative intensities of the carbon signals in the first order 13C NMR spectrum of CD3Cl is: [Question ID = 10044]
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1. 1:4:6:4:1 [Option ID = 40170]
2. 1:3:3:1 [Option ID = 40171]
3. 1:6:15:20:15:6:1 [Option ID = 40172]
4. 1:3:6:7:6:3:1 [Option ID = 40173]
Correct Answer :- 1:3:6:7:6:3:1 [Option ID = 40173]
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Research means [Question ID = 10045]
1. Searching again and again [Option ID = 40174]
2. Finding solution to any problem [Option ID = 40175]
3. Working in a scientific way to search for truth of any problem [Option ID = 40176]
4. None of these [Option ID = 40177]
Correct Answer :- • Working in a scientific way to search for truth of any problem [Option ID = 40176]
What is the final, stable nuclide, X, if radon-222 decays by the emission of four alpha particles and four beta particles? [Question ID = 10046]
1. tungsten-206 [Option ID = 40178]
2. tungsten-214 [Option ID = 40179]
3. platinum-210 [Option ID = 40180]
4. lead-206 [Option ID = 40181]
Correct Answer :- • lead-206 [Option ID = 40181]

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Which type of study is loosely structured and designed to expand understanding of a topic and provide insights? [Question ID = 10048]
1. Formal [Option ID = 40186]
2. Descriptive [Option ID = 40187]
3. Exploratory [Option ID = 40188]
4. Experimental [Option ID = 40189]
Correct Answer :- • Exploratory [Option ID = 40188]
In which region of the infrared spectrum would you expect to find a peak characteristic of a triple bond stretch? [Question ID = 10049]
1. 4000 3000 cm-1 [Option ID = 40190]
2. 2500-2000 cm-1 [Option ID = 40191]
3. 2000-1500 cm-1 [Option ID = 40192]
4. 1500-750 cm-1 [Option ID = 40193]
Correct Answer :- • 2500-2000 cm-1 [Option ID = 40191]
For Cr(CO)6, which of the following statements is correct? [Question ID = 10050]
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1. 4 Cr-O bonds are equivalent [Option ID = 40194]
2. 6 Cr-O bonds are equivalent [Option ID = 40195]
3. All Cr-O bonds are equivalent [Option ID = 40196]
4. All Cr-O bonds are nonequivalent [Option ID = 40197]
Correct Answer :- • 6 Cr-O bonds are equivalent [Option ID = 40195]
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Which of the following is a Wiley Journal? [Question ID = 10051]
1. Chemical Communication [Option ID = 40198]
2. Organic Letter [Option ID = 40199]
3. Angewandte Chemie [Option ID = 40200]
4. Organic & Biomolecular Chemistry [Option ID = 40201]
Correct Answer :- • Angewandte Chemie [Option ID = 40200]
The term symbol/s for S = 1/2 and I = 2 are: [Question ID = 10052]
1. 3P2, 3P₁ and 3Po [Option ID = 40202]
2. 2P5/2 and 2P3/2 [Option ID = 40203]
3. 2D5/2 and 2D3/2 [Option ID = 40204]
4. 2D3 and 2D4 [Option ID = 40205]
Correct Answer :- • 2D5/2 and 2D3/2 [Option ID = 40204]

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The frequency of 3 x 1018 Hz falls in the: [Question ID = 10053]
1. Microwave region [Option ID = 40206]
2. Infra-red region [Option ID = 40207]
3. Visible and ultraviolet region [Option ID = 40208]
4. X-ray region [Option ID = 40209]
Correct Answer :- • X-ray region [Option ID = 40209]
Powder X-ray diffraction practice gives the first (lowest) diffraction angle as 15.5° in an experiment with monochromatic X-rays of wavelength 0.154 nm. The corresponding cell length responsible for this diffracted beam is which of the following? [Question ID = 10054]
1. 0.29 nm [Option ID = 40210]
2. 29 nm [Option ID = 40211]
3. 0.15 nm [Option ID = 40212]
4. 2.3 nm [Option ID = 40213]
Correct Answer :- • 0.29 nm [Option ID = 40210]
Which statement about the trans-effect and the trans-influence is correct? [Question ID = 10056]
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1. The trans-influence is a ground-state effect, whereas the trans-effect has a kinetic origin [Option ID = 40218]
2. The trans-effect is a ground-state effect, whereas the trans-influence has a kinetic origin [Option ID = 40219]
3. Both the trans-effect and trans-influence are ground-state effects [Option ID = 40220]
4. Rates of substitution are affected by the trans-effect but have nothing to do with the trans-influence of ligands. [Option ID = 40221]
Correct Answer :- • The trans-influence is a ground-state effect, whereas the trans-effect has a kinetic origin [Option ID = 40218]
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Which of the following is not a journal? [Question ID = 10057]
1. Science [Option ID = 40222]
2. Tetrahedron Letters [Option ID = 40223]
3. Sci-finder [Option ID = 40224]
4. Nature [Option ID = 40225]
Correct Answer :- • Sci-finder [Option ID = 40224]
Electronic transitions originating from the 25 energy level of an atom to higher levels belong to which series? [Question ID = 10059]
1. Lyman Series [Option ID = 40230]
2. Balmer Series [Option ID = 40231]
3. Brackett Series [Option ID = 40232]
4. Pfund Series [Option ID = 40233]
Correct Answer :- • Balmer Series [Option ID = 40231]

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Cryogenic liquids are: [Question ID = 10060]
1. Materials with boiling points of less than -73°C [Option ID = 40234]
2. Materials with boiling points of more than 73°C [Option ID = 40235]
3. Materials with boiling points 100°C [Option ID = 40236]
4. Materials which are toxic and colored [Option ID = 40237]
Correct Answer :- • Materials with boiling points of less than -73°C [Option ID = 40234]
It takes 12 minutes for the concentration of a radioactive species to decay to its 1/8th value of its original concentration. What is the rate constant of this radioactive decay reaction? [Question ID = 10061]
1. 240 s-1 [Option ID = 40238]
2. 0.00231 s-1 [Option ID = 40239]
3. 0.00289 s-1 [Option ID = 40240]
4. 865.8 s-1 [Option ID = 40241]
Correct Answer :- • 0.00289 s-1 [Option ID = 40240]
The ground state of a harmonic oscillator has number of nodes: [Question ID = 10062]
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1. 3 [Option ID = 40242]
2. 2 [Option ID = 40243]
3. 1 [Option ID = 40244]
4. 0 [Option ID = 40245]
Correct Answer :- • 0 [Option ID = 40245]
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As the temperature of a solution is increased, the conductance in an electrolyte solution will [Question ID = 10065]
1. Become zero [Option ID = 40254]
2. Remain the same [Option ID = 40255]
3. Increase [Option ID = 40256]
4. Decrease [Option ID = 40257]
Correct Answer :- • Increase [Option ID = 40256]
In a reverse micro-emulsion, Wo is defined as: [Question ID = 10066]
1. Wo = [surfactant] / [water] [Option ID = 40258]
2. Wo = [water] / [surfactant] [Option ID = 40259]
3. Wo = 1/ [water] [Option ID = 40260]
4. Wo = 1/ [surfactant] [Option ID = 40261]
Correct Answer :- • Wo = 1/ [surfactant] [Option ID = 40261]

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In an inner-sphere electron transfer reaction, which of the following ligands could not act as a bridging ligand? [Question ID = 10067]
1. 1,10-phenanthroline [Option ID = 40262]
2. 4,4'-bipyridine [Option ID = 40263]
3. Pyrazine [Option ID = 40264]
4. bis(4-pyridyl)methane [Option ID = 40265]
Correct Answer :- • 1,10-phenanthroline [Option ID = 40262]
A doctor studies the relative effectiveness of two drugs of dengue fever. His research would be classified as: [Question ID = 10068]
1. Descriptive Survey [Option ID = 40266]
2. Experimental Research [Option ID = 40267]
3. Case Study [Option ID = 40268]
4. Ethnograph [Option ID = 40269]
Correct Answer :- • Experimental Research [Option ID = 40267]
Which one among the following journal has the highest impact? [Question ID = 10070]
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1. Science [Option ID = 40274]
2. Organic Letters [Option ID = 40275]
3. Angewandte Chemie [Option ID = 40276]
4. Nature [Option ID = 40277]
Correct Answer :- • Science [Option ID = 40274]
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Which of the following does not used to calculate h-index? [Question ID = 10071]
1. Web of Science [Option ID = 40278]
2. Scopus [Option ID = 40279]
3. Google Scholar [Option ID = 40280]
4. Sci-finder [Option ID = 40281]
Correct Answer :- • Sci-finder [Option ID = 40281]
Amongst the following reaction, the major products formed in the following photochemical reactions are:

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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This post was last modified on 27 December 2020

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