Delhi University Entrance Test (DUET) 2020 Previous Year Question Paper With Answer Key
DU PhD in Chemistry
Topic: CHEM PHD S2
1) Parameter defining microcanonical, canonical and grand canonical ensembles are:
[Question ID = 10022]
1. (N, V, T), (N, V, E) and (?, V, T)
[Option ID = 40082]
2. (N, V, E), (N, V, T) and (?, V, T)
[Option ID = 40083]
3. (N, V, T), (?, V, T) and (N, V, E)
[Option ID = 40084]
4. (?, V, T), (N, V, T) and (N, V, E)
[Option ID = 40085]
Correct Answer :
(N, V, E), (N, V, T) and (?, V, T)
[Option ID = 40083]
2) 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]
3) Match the shape to the formula. Which pairing is incorrect?
[Question ID = 10024]
1. [XeF ]?
5 ; pentagonal planar
[Option ID = 40090]
2. XeO ; trigonal planar
3
[Option ID = 40091]
3. XeF ; square planar
4
[Option ID = 40092]
4. [XeF ]+
3
; Tshaped
[Option ID = 40093]
Correct Answer :
XeO ; trigonal planar
3
[Option ID = 40091]
4) 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]
4. All of these
[Option ID = 40101]
Correct Answer :
Pressure
[Option ID = 40098]
5) Which statement is incorrect about XeF , XeF
2
and XeF
4
?
6
[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 H O.
2
[Option ID = 40105]
Correct Answer :
All three compounds react with silica glass at 298 K.
[Option ID = 40102]
6) Green chemistry aims to?
[Question ID = 10029]
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 nonrenewable 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]
7) An aqueous solution containing a concentration of 2.5 x 10 OH ions will have a pH of which of the following?
8
[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]
8) 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]
4. Dictionary
[Option ID = 40121]
Correct Answer :
Encyclopedia
[Option ID = 40120]
9) Which of the following statements regarding a conjugated system is false?
[Question ID = 10032]
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 (ringstructured)
[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 porbital
[Option ID = 40125]
Correct Answer :
The molecule must be cyclic (ringstructured)
[Option ID = 40123]
10) The standard reduction potential Eo for half reactions are :
Zn = Zn + Ze E
2+
o = +0.76 V
Fe = Fe + Ze E
2+
= + 0.41 V
o
The EMF of the cell reaction Fe + Zn = Zn
2+
+ Fe is :
2+
[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]
11) 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]
12) 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. Ultraviolet
[Option ID = 40138]
2. Microwave
[Option ID = 40139]
3. Infrared
[Option ID = 40140]
4. Raman
[Option ID = 40141]
Correct Answer :
Raman
[Option ID = 40141]
13) What is the unit of cell constant of a conductor?
[Question ID = 10038]
1. cm1
[Option ID = 40146]
2. cm
[Option ID = 40147]
3. Siemens
[Option ID = 40148]
4. None of these
[Option ID = 40149]
Correct Answer :
cm1
[Option ID = 40146]
14) In the process of conducting research `Formulation of Hypothesis is followed by:
[Question ID = 10039]
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]
15) A 10 cm of NaOH solution of pH 8 is mixed with 990 cm
3
of water. What is the pH of the resulting solution?
3
[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]
16) The heterocyclic ring present in the aminoacid histidine is:
[Question ID = 10041]
1. pyridine
[Option ID = 40158]
2. tetrahydropyrrole
[Option ID = 40159]
3. indole
[Option ID = 40160]
4. imidazole
[Option ID = 40161]
Correct Answer :
imidazole
[Option ID = 40161]
17) 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]
18) The secondorder rate constant (k2) for the reaction of I with trans[PtCl(CH )(PEt
o
3
)
3
] in methanol at 30
2
C is 40 L.mol
1s1 and with N3 is 7.0 L.mol
s
1
. The given
1
Pt values are 5.42 and 3.58 for the two nucleophiles respectively. The value
of nucleophilic discrimination constant (S) and the firstorder 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]
19) The ratio of the relative intensities of the carbon signals in the first order C NMR spectrum of CD
13
Cl is:
3
[Question ID = 10044]
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]
20) Research is:
[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]
21) What is the final, stable nuclide, X, if radon222 decays by the emission of four alpha particles and four beta particles?
[Question ID = 10046]
1. tungsten206
[Option ID = 40178]
2. tungsten214
[Option ID = 40179]
3. platinum210
[Option ID = 40180]
4. lead206
[Option ID = 40181]
Correct Answer :
lead206
[Option ID = 40181]
22) 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]
23) 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]
24) In the dichromate dianion :
[Question ID = 10050]
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]
25) 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]
26) The term symbol/s for S = ? and I = 2 are:
[Question ID = 10052]
1. P
3
, 3
3
2
P and
1
P0
[Option ID = 40202]
2. P
2
2
5/2 and P3/2
[Option ID = 40203]
3. D
2
2
5/2 and D3/2
[Option ID = 40204]
4. D
2
and 2
3
D4
[Option ID = 40205]
Correct Answer :
D
2
2
5/2 and D3/2
[Option ID = 40204]
27) The frequency of 3 x 10 Hz falls in the:
18
[Question ID = 10053]
1. Microwave region
[Option ID = 40206]
2. Infrared region
[Option ID = 40207]
3. Visible and ultraviolet region
[Option ID = 40208]
4. Xray region
[Option ID = 40209]
Correct Answer :
Xray region
[Option ID = 40209]
28) A diffraction pattern from a single cubic lattice gives the first (lowest) diffraction angle as 15.5o in an experiment with
incident Xrays 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]
29) Which statement about the transeffect and the transinfluence is correct?
[Question ID = 10056]
1. The transinfluence is a groundstate effect, whereas the transeffect has a kinetic origin
[Option ID = 40218]
2. The transeffect is a groundstate effect, whereas the transinfluence has a kinetic origin
[Option ID = 40219]
3. Both the transeffect and transinfluence are groundstate effects
[Option ID = 40220]
4. Rates of substitution are affected by the transeffect but have nothing to do with the transinfluence of ligands.
[Option ID = 40221]
Correct Answer :
The transinfluence is a groundstate effect, whereas the transeffect has a kinetic origin
[Option ID = 40218]
30) Which of the following is not a journal?
[Question ID = 10057]
1. Science
[Option ID = 40222]
2. Tetrahedron Letters
[Option ID = 40223]
3. Scifinder
[Option ID = 40224]
4. Nature
[Option ID = 40225]
Correct Answer :
Tetrahedron Letters
[Option ID = 40223]
31) Electronic transitions originating from the 2S 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]
32) Cryogenic liquids are:
[Question ID = 10060]
1. Materials with boiling points of less than -73 C
o
[Option ID = 40234]
2. Materials with boiling points of more than 73 C
o
[Option ID = 40235]
3. Materials with boiling points 100 C
o
[Option ID = 40236]
4. Materials which are toxic and colored
[Option ID = 40237]
Correct Answer :
Materials with boiling points of less than -73 C
o
[Option ID = 40234]
33) 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 s1
[Option ID = 40238]
2. 0.00231 s1
[Option ID = 40239]
3. 0.00289 s1
[Option ID = 40240]
4. 865.8 s1
[Option ID = 40241]
Correct Answer :
0.00289 s1
[Option ID = 40240]
34) The ground state of a harmonic oscillator has number of nodes:
[Question ID = 10062]
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]
35) 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]
36) In a reverse microemulsion, 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]
37) In an innersphere electron transfer reaction, which of the following ligands could not act as a bridging ligand?
[Question ID = 10067]
1. 1,10phenanthroline
[Option ID = 40262]
2. 4,4'bipyridine
[Option ID = 40263]
3. Pyrazine
[Option ID = 40264]
4. bis(4pyridyl)methane
[Option ID = 40265]
Correct Answer :
1,10phenanthroline
[Option ID = 40262]
38) 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]
39) Which one among the following journal has the highest impact?
[Question ID = 10070]
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]
40) Which of the following does not used to calculate hindex?
[Question ID = 10071]
1. Web of Science
[Option ID = 40278]
2. Scopus
[Option ID = 40279]
3. Google Scholar
[Option ID = 40280]
4. Scifinder
[Option ID = 40281]
Correct Answer :
Scifinder
[Option ID = 40281]
41) Amongst the following reaction, the major products formed in the following photochemical reactions are:
[Question ID = 10191]
1. A and C
[Option ID = 40758]
2. B and C
[Option ID = 40759]
3. A and D
[Option ID = 40760]
4. A and B
[Option ID = 40761]
Correct Answer :
A and B
[Option ID = 40761]
42) The major product (P) and the rearrangement involved in the following reaction is:
[Question ID = 10192]
1.
[Option ID = 40762]
2.
[Option ID = 40763]
3.
[Option ID = 40764]
4. none of these
[Option ID = 40765]
Correct Answer :
[Option ID = 40763]
43) Match the following drugs with their medicinal activity
[Question ID = 10193]
1. Ai, B ii
[Option ID = 40766]
2. Aiv, Biii
[Option ID = 40767]
3. Aiii, Biv
[Option ID = 40768]
4. Aiii, Bi
[Option ID = 40769]
Correct Answer :
Aiii, Bi
[Option ID = 40769]
44) Number of isoprene units present in lupeol is:
[Question ID = 10194]
1. two
[Option ID = 40770]
2. four
[Option ID = 40771]
3. six
[Option ID = 40772]
4. eight
[Option ID = 40773]
Correct Answer :
six
[Option ID = 40772]
45) The major product M and N formed in the following reactions are:
[Question ID = 10195]
1.
[Option ID = 40774]
2.
[Option ID = 40775]
3.
[Option ID = 40776]
4.
[Option ID = 40777]
Correct Answer :
[Option ID = 40776]
46) The absolute configurations of the chiral centers of starting ketone in the following reaction are:
[Question ID = 10196]
1. 3R, 6S
[Option ID = 40778]
2. 3S, 6S
[Option ID = 40779]
3. 3R, 6R
[Option ID = 40780]
4. 3S, 6R
[Option ID = 40781]
Correct Answer :
3R, 6S
[Option ID = 40778]
47) An organic compound (C H
9
O
10
) exhibited the following spectral data:
3
IR: 3400, 1680 cm1
H NMR: 7.8 (1H, d, J = 8.0 Hz), 7.0 (1H, d, J = 8 Hz), 6.5 (1H, s), 5.8 (1H, s, D
1
O exchangeable), 3.9 (3H, s), 2.3 (3H,
2
s). The compound is:
[Question ID = 10197]
1.
[Option ID = 40782]
2.
[Option ID = 40783]
3.
[Option ID = 40784]
4.
[Option ID = 40785]
Correct Answer :
[Option ID = 40785]
48) The sign below indicates what type of safety hazard?
[Question ID = 10198]
1. Biohazard
[Option ID = 40786]
2. Toxic chemical
[Option ID = 40787]
3. Hazardous
[Option ID = 40788]
4. Firecatching
[Option ID = 40789]
Correct Answer :
Biohazard
[Option ID = 40786]
49) Which of the following compounds would not be considered aromatic in its behavior?
[Question ID = 10199]
1.
[Option ID = 40790]
2.
[Option ID = 40791]
3.
[Option ID = 40792]
4.
[Option ID = 40793]
Correct Answer :
[Option ID = 40793]
50) Rank the following in decreasing order of basic strength is:
A)
B)
C)
D)
[Question ID = 10200]
1. B> A> D >C
[Option ID = 40794]
2. D> A> B >C
[Option ID = 40795]
3. A> D> B >C
[Option ID = 40796]
4. A> D> C >B
[Option ID = 40797]
Correct Answer :
A> D> B >C
[Option ID = 40796]
This post was last modified on 27 December 2020