DUET 2019 PhD in Chemistry Previous Queston Papers

Delhi University Entrance Test (DUET) 2019 PhD in Chemistry Previous Queston Papers

This post was last modified on 19 June 2020

Download Document

DUET Last 10 Years 2011-2021 Question Papers With Answer Key || Delhi University Entrance Test conducted by the NTA

FirstRanker's choice

7/7/2019

FirstRanker.com

--- Content provided by‌ FirstRanker.com ---

DU PhD in Chemistry

Topic:- DU_J19_PHD_CHEM

Which of the two complexes W(CO)6 or IrCI(PPh2)2(CO) should undergo the faster exchange with 13CO, and the reason is [Question ID = 2056]
1. IrCI(PPh2)2(CO), associative process [Option ID = 8222]
2. IrCI(PPh2)2(CO), dissociative process [Option ID = 8221]
3. W(CO)6, interchange process [Option ID = 8223]
4. None of these [Option ID = 8224]
Correct Answer :-
- IrCI(PPh2)2(CO), dissociative process [Option ID = 8221]
Which one is known as 'oil of bitter almonds'? [Question ID = 15232]
1. Cinnamaldehyde [Option ID = 30925]
2. None of these [Option ID = 30928]
3. Benzaldehyde [Option ID = 30927]
4. Salicylaldehyde [Option ID = 30926]
Correct Answer :-
- Cinnamaldehyde [Option ID = 30925]
Calculate the difference in the populations of the two nuclear spin states of ¹H nuclei in a magnetic field of 10 T at a temperature of 298 K. The m 107 T-1s-1. [Question ID = 1988]
1. 2 nuclei in 106 [Option ID = 7950]
2. 17 nuclei in 106 [Option ID = 7951]
3. 34 nuclei in 106 [Option ID = 7949]
4. 128 nuclei in 106 [Option ID = 7952]
Correct Answer :-
- 34 nuclei in 106 [Option ID = 7949]

--- Content provided by⁠ FirstRanker.com ---

The activation energy (Ea) of a chemical reaction can be obtained by plotting: [Question ID = 1983]
1. Logarithm of rate constant versus absolute temperature [Option ID = 7929]
2. Logarithm of rate constant versus logarithm of absolute temperature [Option ID - 7930]
3. Logarithm of rate constant versus reciprocal of absolute temperature [Option ID = 7932]
4. Rate constant versus reciprocal of absolute temperature [Option ID = 7931]
Correct Answer :-
- Logarithm of rate constant versus absolute temperature [Option ID = 7929]
Mossbauer spectroscopy is concerned with (A) Doppler effect (B) Photoelectric effect (C) Recoil energy (D) Cotton Effect [Question ID = 1990]
1. A, C [Option ID = 7958]
2. A, B [Option ID = 7957]
3. B, C [Option ID = 7959]
4. B, D [Option ID = 7960]
Correct Answer :-
- A, B [Option ID = 7957]
If a system loses 250 kJ of heat at the same time that it is doing 500 kJ of work, what is the change in the internal energy of the system? [Questi
1. -750 kJ [Option ID = 8248]
2. +250 kJ [Option ID = 8245]
3. -250 kJ [Option ID = 8247]
4. +750 kJ [Option ID = 8246]
Correct Answer :-
- +250 kJ [Option ID = 8245]
The molecule CO2 belongs to the symmetry group [Question ID = 1984]
1. Dood [Option ID = 7935]
2. Dooh [Option ID = 7934]
3. D2h [Option ID = 7933]
4. D2d [Option ID = 7936]
Correct Answer :-
- D2h [Option ID = 7933]
In Stern-Gerlach's experiment the kind of magnetic field used was? [Question ID = 1982]
1. Inhomogeneous [Option ID = 7926]
2. Linear [Option ID = 7927]
3. Homogeneous [Option ID = 7925]
4. Circular [Option ID = 7928]
Correct Answer :-
- Homogeneous [Option ID = 7925]

--- Content provided by‌ FirstRanker.com ---

Among the following, reactions which provides 1-butene as the major product is [Question ID = 2036]
1. H2SO4
  OH
  [Option ID = 8144]
2. --- Content provided by FirstRanker.com ---
  t-BuOK
  Br
  [Option ID = 8141]
3. AgOH
  --- Content provided by FirstRanker.com ---
  [Option ID = 8143]
4. t-BuOK
  Br
  [Option ID = 8142]
Correct Answer :-
- t-BuOK
  Br
  [Option ID = 8141]

--- Content provided by FirstRanker.com ---

Among the following diacids, the one that forms an anhydride fastest on heating with acetic anhydride is: [Question ID = 2027]
1. COOH
  COOH
  [Option ID = 8105]
2. --- Content provided by FirstRanker.com ---
  COOH
  COOH
  [Option ID = 8108]
3. COOH
  --- Content provided by FirstRanker.com ---
  HOOC
  [Option ID = 8107]
4. COOH
  COOH
  --- Content provided by FirstRanker.com ---
  [Option ID = 8106]
Correct Answer :-
- COOH
  COOH
  [Option ID = 8105]
The free gas phase ion V3+ has a 3F ground term. The 1D and 3P terms lie respectively 10642 cm-1 and 12920 cm¯¹ above it. The energies of the E(3F) = A - 8B, E(3P) = A + 7B, E(1D) = A - 3B + 2C. The values of B and C for V3+ are [Question ID = 2049]
1. B = 3168 cm¯¹, C = 861 cm¯¹ [Option ID = 8194]
2. B = 168 cm-1, C = 8613 cm-1 [Option ID = 8195]
3. B = 861 cm¯¹, C = 3168 cm¯¹ [Option ID = 8193]
4. B = 8613 cm¯¹, C = 168 cm¯¹ [Option ID = 8196]
Correct Answer :-
- B = 861 cm¯¹, C = 3168 cm¯¹ [Option ID = 8193]
The bond length of a homo-nuclear di-atomic molecule can be obtained by [Question ID = 1981]
1. Vibrational Spectroscopy [Option ID = 7924]
2. Mossbauer Spectroscopy [Option ID = 7921]
3. Rotational Raman Spectroscopy [Option ID = 7923]
4. Microwave Spectroscopy [Option ID = 7922]
Correct Answer :-
- Mossbauer Spectroscopy [Option ID = 7921]
What is kinetic isotope effect? [Question ID = 2078]
1. Vibrational frequency of the isotopically substituted bond [Option ID = 8311]
2. Reduced mass of the system with the isotopic substitution [Option ID = 8312]
3. Relative rate of the reaction with the two isotopes (normal vs. different isotope). [Option ID = 8310]
4. Bond dissociation energy of the isotopically substituted bond. [Option ID = 8309]
Correct Answer :-
- Bond dissociation energy of the isotopically substituted bond. [Option ID = 8309]
The conditions for a species to follow Fermi-Dirac statistics are [Question ID = 1993]
1. Particles are distinguishable, with no restriction on filling up of energy levels [Option ID = 7970]
2. Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 7969]
3. Particles are indistinguishable, with no restriction on filling up of energy levels [Option ID = 7972]
4. Particles are indistinguishable, with a restriction on filling up of energy levels [Option ID = 7971]
Correct Answer :-
- Particles are distinguishable, with a restriction on filling up of energy levels [Option ID = 7969]

--- Content provided by‍ FirstRanker.com ---

The moment of inertia of O2 molecule having internuclear distance of 121 pm is [Question ID = 19951
1. 2.95 X 10-46 Kg m² [Option ID = 7977]
2. 2.95 X 10 -44 Kg m² [Option ID = 7978]
3. 1.95 X 10 46 Kg m² [Option ID = 7979]
4. 1.95 X 10-46 Kg m2 [Option ID = 7980]
Correct Answer :-
- 2.95 X 10-46 Kg m² [Option ID = 7977]
For a non-linear and non-cyclic molecule with N atoms, what is the number of bending modes of vibration? [Question ID = 1985]
1. 2N-5 [Option ID = 7939]
2. 3N-5 [Option ID = 7938]
3. 2N-4 [Option ID = 7940]
4. 3N-6 [Option ID = 7937]
Correct Answer :-
- 3N-6 [Option ID = 7937]
The number of Zn2+ ions and S2- ions are in the ZnS sphalerite unit cell [Question ID = 2059]
1. 2, 4 [Option ID = 8236]
2. 8, 8 [Option ID = 8235]
3. 1, 1 [Option ID = 8234]
4. 4, 4 [Option ID = 8233]
Correct Answer :-
- 4, 4 [Option ID = 8233]
The number of ESR signals formed in the spectrum of naphthalene anion radical are [Question ID = 1992]
1. 28 [Option ID = 7968]
2. 27 [Option ID = 7967]
3. 25 [Option ID = 7965]
4. 26 [Option ID = 7966]
Correct Answer :-
- 25 [Option ID = 7965]
The pH of a 1 molar solution of a weak acid with a Ka = 10-10 will be [Question ID = 2060]
1. none of these [Option ID = 8240]
2. 5 [Option ID = 8239]
3. 1 [Option ID = 8238]
4. 10 [Option ID = 8237]
Correct Answer :-
- 10 [Option ID = 8237]

--- Content provided by FirstRanker.com ---

The compound given below is:
[Question ID = 2043]
1. anti-aromatic and has no dipole moment [Option ID = 8172]
2. non-aromatic and has high dipole moment [Option ID = 8171]
3. aromatic and has high dipole moment [Option ID = 8169]
4. aromatic and has no dipole moment [Option ID = 8170]
Correct Answer :-
- aromatic and has high dipole moment [Option ID = 8169]
How many products will be formed in the following reaction?
1. OsO4
[Question ID = 2048]
1. 2 [Option ID = 8190]
2. 10 [Option ID = 8189]
3. 3 [Option ID = 8191]
4. 4 [Option ID = 8192]
Correct Answer :-
- 10 [Option ID = 8189]
2. NaHSO3

--- Content provided by⁠ FirstRanker.com ---

The major product formed in the reaction given below is:
CO2Me
+
N
product
--- Content provided by‍ FirstRanker.com ---
CO2Me
[Question ID = 2025]
1. None of these [Option ID = 8100]
2. N
  -CO2Me
  --- Content provided by⁠ FirstRanker.com ---
  CO2Me
  [Option ID = 8098]
3. MeO2C
  CO2Me
  --- Content provided by‍ FirstRanker.com ---
  N
  [Option ID = 8097]
4. N
  MeO2C
  --- Content provided by⁠ FirstRanker.com ---
  CO2Me
  [Option ID = 8099]
Correct Answer :-
- MeO2C
  CO2Me
  --- Content provided by FirstRanker.com ---
  N
  [Option ID = 8097]
Identify the major product of the reaction?
CH3
--- Content provided by⁠ FirstRanker.com ---
NaOEt
CI
E2 reaction
[Question ID = 2022]
1. CH3
  --- Content provided by FirstRanker.com ---
  Me
  Me
  [Option ID = 8085]
2. CH3
  --- Content provided by⁠ FirstRanker.com ---
  [Option ID = 8086]
3. Me Me
  CH3
  [Option ID = 8087]
4. Me Me
  CH3
  Me
  [Option ID = 8088]
Correct Answer :-
- CH3
  Me
  Me
  [Option ID = 8085]
The following photochemical conversion proceeds through
?
Me
H
--- Content provided by‌ FirstRanker.com ---
hu
&
H
[Question ID = 2033]
1. Paterno-Buchi reaction [Option ID = 8130]
2. Norrish type II reaction [Option ID = 8132]
3. Norrish type I reaction [Option ID = 8131]
4. Barton reaction [Option ID = 81291
Correct Answer :-
- Barton reaction [Option ID = 8129]
Find out the major product of the following reaction is:
--- Content provided by FirstRanker.com ---
HOOH
[Question ID = 2015]
CH3(CN)CuLi
(2.5 eq)
1. --- Content provided by FirstRanker.com ---
  HOCHO
  [Option ID = 8059]
2. ?
  OH
  --- Content provided by‍ FirstRanker.com ---
  [Option ID = 8058]
3. ?
  CHO
  [Option ID = 8057]
4. HOOH
  [Option ID = 8060]
Correct Answer :-
- CHO
  --- Content provided by‍ FirstRanker.com ---
  [Option ID = 8057]
The product obtained from the following sequence of reaction is:
Me
HgSO4
--- Content provided by FirstRanker.com ---
A
NaBH4
B
H2SO4
The product obtained from the following sequence of reaction is:
--- Content provided by FirstRanker.com ---
[Question ID = 2023]
1. 2-propanol [Option ID = 8090]
2. propanol [Option ID 8092]
3. propanol [Option ID = 8089]
4. 1-propanol [Option ID = 8091]
Correct Answer :-
- propanol [Option ID = 8089]
Which of the following is the correct normalization coefficient of the wave function ? = A sin (?px/L) for a particle in one-dimensional box of length L? [Question ID = 1987]
1. (L/2) 1/2 [Option ID = 7948]
2. (2/L) 1/2 [Option ID = 7947]
3. (2) 1/2 [Option ID = 7945]
4. (1/L) 1/2 [Option ID = 7946]
Correct Answer :-
- (2) 1/2 [Option ID = 7945]
The major product formed in the following reaction is:
HO
Ph
--- Content provided by FirstRanker.com ---
Ph
hu
1. OH OH
  [Option ID = 8074]
2. HO
  OH Ph
  [Option ID = 8075]
3. --- Content provided by FirstRanker.com ---
  HO
  Ph
  [Option ID = 8073]
4. None of these [Option ID = 8076]
Correct Answer :-
- --- Content provided by FirstRanker.com ---
  HO
  Ph
  OH
  [Option ID = 8073]

--- Content provided by‌ FirstRanker.com ---

Find Major Product of the following reaction:
Me
CF3CO3H, BF3.OEt2
Me
CH2Cl2, 0 to 8 °C, H2O
--- Content provided by‌ FirstRanker.com ---
[Question ID = 2016]
1. Me
  [Option ID = 8062]
2. ?
  --- Content provided by FirstRanker.com ---
  Me
  [Option ID = 8063]
3. Me
  [Option ID = 8064]
4. ?
  Me
  Me
  [Option ID = 8061]
Correct Answer :-
- Me
  Me
  [Option ID = 8061]

--- Content provided by⁠ FirstRanker.com ---

Find product (A) of the below reaction is:
Me
CH3(CN)CuLi
(2.5 eq)
A
--- Content provided by‌ FirstRanker.com ---
OAC
[Question ID = 2014]
1. Me
  Me
  [Option ID = 8054]
2. Me
  Me
  [Option ID = 8055]
3. --- Content provided by FirstRanker.com ---
  4.
  3 Mel
  Me
  ?
  Me
  --- Content provided by‍ FirstRanker.com ---
  [Option ID = 8053]
Correct Answer :-
- Me
  S
  Me
  --- Content provided by‌ FirstRanker.com ---
  [Option ID = 8056]
Citronellol A on oxidation with pyridinium chlorochromate (PCC) followed by treatment w sodium hydroxide gives the product B (IR: 1720 cm-¹); whereas oxidation with PCC in the pr of sodium acetate gives the product C(IR: 1720 cm³¹). Compound B and C are
OH
A
--- Content provided by⁠ FirstRanker.com ---
[Question ID = 2026]
1. CHO
  B=
  C=
  CHO
  --- Content provided by‍ FirstRanker.com ---
  [Option ID = 8101]
2. CHO
  B=
  C=
  --- Content provided by‍ FirstRanker.com ---
  [Option ID = 8104]
3. CHO
  B=
  C=
  --- Content provided by FirstRanker.com ---
  CHO
  [Option ID = 8103]
4. CHO
  B=
  --- Content provided by‌ FirstRanker.com ---
  C=
  [Option ID = 8102]
Correct Answer :-
- CHO
  B=
  --- Content provided by FirstRanker.com ---
  C=
  CHO
  [Option ID = 8101]
The correct order for the rates of electrophilic aromatic substitution of the following compo
--- Content provided by FirstRanker.com ---
N
N
1
Me
(1)
--- Content provided by⁠ FirstRanker.com ---
(II)
[Question ID = 2030]
1. III>II> I [Option ID = 8119]
2. I>III> II [Option ID = 8120]
3. I>II> III [Option ID = 8117]
4. II>I> III [Option ID = 8118]
Correct Answer :-
- I>II> III [Option ID = 8117]
CI
(III)
What does the following symbol refer in a laboratory
[Question ID = 2054]
1. Flammable [Option ID = 8214]
2. Oxidizing [Option ID = 8216]
3. Corrosive [Option ID = 8215]
4. Poisonous [Option ID = 8213]
Correct Answer :-
- Poisonous [Option ID = 8213]

--- Content provided by‍ FirstRanker.com ---

The correct order of the bond dissociation energies for the indicated C-H bond in the follow compounds is:
H
H
(A)
[Question ID = 2032]
1. C>B> A [Option ID = 8125]
2. A>C> B [Option ID = 8127]
3. C>A> B [Option ID = 8128]
4. A>B> C [Option ID = 8126]
Correct Answer :-
- C>B> A [Option ID = 8125]
H
--- Content provided by FirstRanker.com ---
(B)
(C)
The Coulomb potential energy at distance r of a hydrogenic atom of atomic number Z is proportional to.
[Question ID = 1986]
1. Zr
  [Option ID = 7941]
2. 1/Zr
  [Option ID = 7944]
3. Z/r
  [Option ID = 7942]
4. r/Z
  --- Content provided by FirstRanker.com ---
  [Option ID = 7943]
Correct Answer :-
- Zr
  [Option ID = 7941]
A buffer made of Question ID = 20521
1. weak acid + conjugate base [Option ID = 8205]
2. distilled water + strong base [Option ID = 8207]
3. strong acid + conjugate base [Option ID = 8206]
4. distilled water + salt [Option ID = 8208]
Correct Answer :-
- weak acid + conjugate base [Option ID = 8205]

--- Content provided by‌ FirstRanker.com ---

What is graphene?
[Question ID = 15233]
1. A new material made from carbon nanotubes [Option ID = 30929]
2. A one-atom thick sheet of carbon [Option ID = 30931]
3. Thin film made from fullerenes [Option ID = 30930]
4. None of these [Option ID = 30932]
Correct Answer :-
- A new material made from carbon nanotubes [Option ID = 30929]
The major product formed in the reaction of quinoline with potassium amide (KNH2) in liquid ammonia is [Question ID = 2041]
1. N
  [Option ID = 8163]
  --- Content provided by‌ FirstRanker.com ---
  H2N
2. N
  [Option ID = 8164]
3. --- Content provided by‍ FirstRanker.com ---
  N
  NH2
  [Option ID = 8162]
4. IN
  --- Content provided by FirstRanker.com ---
  [Option ID = 8161]
Correct Answer :-
- ZI
  [Option ID = 8161]

--- Content provided by‌ FirstRanker.com ---

L-DOPA is used for the treatment of [Question ID = 2028]
1. Diabetes [Option ID = 8111]
2. Tuberculosis [Option ID = 8109]
3. Cancer [Option ID = 8112]
4. Parkinson's disease [Option ID = 8110]
Correct Answer :-
- Tuberculosis [Option ID = 8109]
Which of the following is the correct setf apparatus for fractional distillation? [Question ID = 2053]
1. Round bottomed flask, thermometer, fractionating column, water condenser and flask [Option ID = 8209]
2. Round bottomed flask, thermometer, water condenser and beaker [Option ID = 8211]
3. Round bottomed flask, thermometer, fractionating column, air condenser and flask [Option ID = 8210]
4. Round bottomed flask, thermometer, air condenser and beaker [Option ID = 8212]
Correct Answer :-
- Round bottomed flask, thermometer, fractionating column, water condenser and flask [Option ID = 8209]
Which of the following is the correct antisymmetric wave function for the ground state of He atom [Question ID = 1989]
1. [1/(2)1/2] 15A(1)158(2)ß(1)ß(2)
  [Option ID = 7956]
2. 15A(1)158(2)a(1)a(2)
  --- Content provided by‍ FirstRanker.com ---
  [Option ID = 7953]
3. [1/(2)1/2] 15A(1)158(2) [a(1)ß(2) - a(2)ß(1)]
  [Option ID = 7955]
4. 15A(1)158(2)a(1)ß(2)
  [Option ID = 7954]
Correct Answer :-
- [Option ID = 7953]
  15A(1)158(2)a(1)a(2)
Which of the following exhibit quadruple splitting? [Question ID = 1991]
1. K3[Fe(CN)6] [Option ID = 7962]
2. Fe(CO)5 [Option ID = 7964]
3. [Fe(H2O)6]Cl3 [Option ID = 7963]
4. K4[Fe(CN)6] [Option ID = 7961]
Correct Answer :-
- K4[Fe(CN)6] [Option ID = 7961]
Which of the following does not affect the broadness of spectral lines of a sample? [Question ID = 1996]
1. Collisions between involves atoms/molecules [Option ID = 7981]
2. Doppler Effect [Option ID = 7982]
3. Heisenberg's Uncertainty principle [Option ID = 7983]
4. Path length of a sample [Option ID = 7984]
Correct Answer :-
- Collisions between involves atoms/molecules [Option ID = 7981]

--- Content provided by⁠ FirstRanker.com ---

Which of the following is not a correct sequence for basic strength of compounds in aqueous medium? [Question ID = 2055]
1. CH3NH2 > pyridine > aniline [Option ID = 8220]
2. (C2H5)2NH > (C2H5)3N > C2H5NH2 [Option ID = 8218]
3. aniline > pyrrole > pyridine [Option ID = 8219]
4. (CH3)2NH > CH3NH2 > (CH3)3N [Option ID = 8217]
Correct Answer :-
- (CH3)2NH > CH3NH2 > (CH3)3N

FirstRanker.com

--- Content provided by⁠ FirstRanker.com ---

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

This post was last modified on 19 June 2020

Get the MBBS Question Bank Android App

DUET 2019 PhD in Chemistry Previous Queston Papers

Share This Post:

Share This Post: