JNUEE 2020 Question Paper MA, M.Sc, MCA Chemistry

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Roll No:
Application No:
Name:
Exam Date: 07-Oct-2020
Exam Time: 15:00-18:00
Examination: 1. Course Code - M.A./M.Sc./M.C.A.
2. Field of Study - Chemistry (CHEM)
SECTION 1 - SECTION 1

Question No.1 (Question Id - 30)

(A) NaBH4
(B) NaBH4/CeCl3 (Correct Answer)
(C) LiAlH4
(D) DIBAL - H
(E) H2/Pd

Question No.2 (Question Id - 8)

(A)

(B)

(C)

(D)

(E)

Question No.3 (Question Id - 6)

(A)

(B)

(C)

(D)

(E)

Question No.4 (Question Id - 37)

(A) A(c), B(b), C(b), D(c)
(B) A(a), B(b), C(c), D(b)
(C) A(a), B(a), C(b), D(a)
(D) A(a), B(a), C(c), D(b) (Correct Answer)
(E) A(b), B(c), C(a), D(c)

Question No.5 (Question Id - 49)
The O - O stretching vibration in oxyhemoglobin is :
(A) Higher than O - O stretching vibration of molecular oxygen
(B) Lower than O - O stretching vibration of molecular oxygen (Correct Answer)
(C) Equal to the O - O stretching vibration of molecular oxygen
(D) Very close to the O - O stretching vibration of hemocyanin
(E) Close to the O - O stretching vibration of Na2O2

Question No.6 (Question Id - 25)

(A) Only A
(B) Only B
(C) A is major and B is minor (~A>B) (Correct Answer)
(D) B is major and A is minor (~B>A)
(E) A and B formed equally (A = B)

Question No.7 (Question Id - 45)
The color of Ruby(Al2O3 contains 0.2 - 1 atom% of Cr3+) and potassium permanganate are because of :

(A) d - d transition and ligand-to-metal charge-transfer transition, respectively

(B) ligand-to-metal charge-transfer and d-d transition, respectively
(C) d - d transition and d - d transition, respectively
(D) Ligand-to-metal charge-transfer and ligand-to-metal charge transfer transition, respectively

(E) Metal-to-ligand charge-transfer and ligand-to-metal charge-transfer, transition, respectively

Question No.8 (Question Id - 31)
The 13C NMR spectrum for the following compound contains these peaks : 17.3, 61.1, 100 - 150 ppm(four peaks) and 166.8
ppm. The compound will be :

(A)

(B)

(C)

(D)

(E)

Question No.9 (Question Id - 18)

(A)

(B)

(C)

(D)

(E)

Question No.10 (Question Id - 29)

(A)

(B)

(C)

(D)

(E) Ph - C2H5

Question No.11 (Question Id - 10)
For the mixing of two ideal gases at same temperature and pressure, which of the following is incorrect ?

(A) ∆Smix > 0
(B) ∆Hmix < 0 (Correct Answer)
(C) ∆Gmix < 0
(D) ∆Ssurr = 0
(E) ∆Hmix = 0

Question No.12 (Question Id - 16)
The rotational constant and interatomic distance of HF are given by 4.1 x 10-22 J and 92 pm, respectively. The moment of
inertia of the molecule is calculated as :

(A) 4.20 x 10-47 kgm2
(B) 2.81 x 10-46 kgm2
(C) 1.36 x 10-47 kgm2 (Correct Answer)
(D) 2.81 x 10-47 kgm2
(E) 3.47 x 10-46 kgm2

Question No.13 (Question Id - 20)

(A) A→B→C→D
(B) A → C → B → D (Correct Answer)
(C) A→D→B→C
(D) A→C→D→B
(E) A→B→D→C

Question No.14 (Question Id - 26)

(A) (A), (C)
(B) (A), (D) (Correct Answer)
(C) (B), (C)
(D) (B), (D)
(E) (A), (B), (C), (D)

Question No.15 (Question Id - 19)

(A) All are hototopic
(B) Homotopic; Heterotopic; Heterotopic
(C) Heterotopic; Homotopic; Heterotopic

(D) Homotopic; Homotopic; Heterotopic (Correct Answer)
(E) Homotopic; Heterotopic; Homotopic

Question No.16 (Question Id - 1)

(A)

(B) zero
(C)

(D)

(E)

Question No.17 (Question Id - 32)

(A) C>D>B>A
(B) B > D > A > C (Correct Answer)
(C) A>B>C>D
(D) A>C>B>D
(E) B>D>C>A

Question No.18 (Question Id - 2)

(A) 45∘
(B) 10∘
(C) 62∘ (Correct Answer)
(D) 28∘
(E) 76∘

Question No.19 (Question Id - 41)

(A) A(c), B(a), C(a) (Correct Answer)
(B) A(a), B(a), C(c)
(C) A(c), B(c), C(a)
(D) A(a), B(c), C(a)
(E) A(c), B(c), C(c)

Question No.20 (Question Id - 50)
One can describe the oxygen binding motif in oxyhemerythrin as :

(A) η1 - superoxide
(B) η1 - Hydroperoxide (Correct Answer)
(C) μ - η2 : η2 - peroxide
(D) η2 - superoxide
(E) η2 - peroxide

Question No.21 (Question Id - 27)

(A)

(B)

(C)

(D)

(E)

Question No.22 (Question Id - 12)
Which of the following statements about the temperature dependence of reaction rates is correct ?

(A)

(B) Activation energy is the maximum energy that reactants must have in order to form products.

(C) Reactions of the same order must have the same activation energy.
(D) Stronger dependence of reaction rate on temperature leads to higher activation energy.

(E) Temperature dependence of reaction rates always has to follow the ‘Linear’ behaviour.

Question No.23 (Question Id - 7)
For a cubic crystal if the relationship between the lattice distance (d) and the wavelength (λ) of X-ray is represented as d =
4.85λ, then the difference between the angles of first and third order diffraction from the crystal would be :

(A) 9.70∘
(B) 5.95∘
(C) 30.72∘
(D) 12.10∘ (Correct Answer)
(E) 18.02∘

Question No.24 (Question Id - 38)
Consider, the following reaction is occuring when M = Fe2+, Fe3+, Cr3+ and Ni2+.
[M(H2O)6]n+ + H2O ⇌ [M(H2O)5 (OH)](n-1)+ + H3O+
Which of the following answer is correct for the increasing order of pKa values of different metal ions ?

(A) Fe2+ < Ni2+ < Cr3+ < Fe3+
(B) Cr3+ < Fe3+ < Fe2+ < Ni2+
(C) Fe3+ < Cr3+ < Ni2+ < Fe2+ (Correct Answer)
(D) Cr3+ < Fe3+ < Ni2+ < Fe2+
(E) Fe2+ < Fe3+ < Ni2+ < Cr3+

Question No.25 (Question Id - 39)

(A) 2.95 x 1010 (Correct Answer)
(B) 3.52 x 1015
(C) 4.4 x 108
(D) 3.52 x 104
(E) 4.1 x 1017

Question No.26 (Question Id - 5)

(A) B<A<C<D
(B) A<C<D<B
(C) A < B < C < D (Correct Answer)
(D) B<D<C<A
(E) C<D<A<B

Question No.27 (Question Id - 21)

(A)

(B)

(C)

(D)

(E)

Question No.28 (Question Id - 47)
A researcher has measured the room temperature magnetic moments of Na2[PdCl4] and [Fe(H2O)6](ClO4)2. In your opinion,
which of the following set of answers fits well with your expectation ?

(A) 0 and 5.1μB, respectively (Correct Answer)
(B) 2.9 μB and 0, respectively
(C) 0 and 4.7μB, respectively
(D) 2.83μB and 4.90μB, respectively
(E) 0 and 0, respectively

Question No.29 (Question Id - 23)

(A)

(B)

(C)

(D)

(E)

Question No.30 (Question Id - 4)
The de-Broglie wavelength associated with an electron in the first Bohr orbit of hydrogen atom is :

(A) 5.30 pm
(B) 332 pm (Correct Answer)
(C) 3.30 nm
(D) 5.32 nm
(E) 727 pm

Question No.31 (Question Id - 44)
Categorize the following compounds according to the increasing order of C - O bond distances :

A. [V(CO)6]-

B. [Fe(CO)6]2+

C. [Mn(CO)6]+

D. [Cr(CO)6]

E. [Fe(CO)4]2-

Choose the correct answer from the options given below :

(A) B < C < D < A < E (Correct Answer)
(B) A<E<D<C<B
(C) E<A<D<C<B
(D) B<C<E<D<A
(E) E<A<D<B<C

Question No.32 (Question Id - 24)

(A)

(B)

(C)

(D)

(E)

Question No.33 (Question Id - 40)

(A) 2.25 V
(B) 2.21 V (Correct Answer)
(C) 2.19 V
(D) - 2.19 V
(E) 2.3 V

Question No.34 (Question Id - 22)

(A)

(B)

(C)

(D)

(E)

Question No.35 (Question Id - 28)

(A)

(B)

(C)

(D)

(E)

Question No.36 (Question Id - 14)
The observed fluorescence lifetime of a certain fluorophore is 25.0 x 10-9 s and its fluorescence quantum yield is 0.50. The
rate constant for fluorescence KF is :

(A) 12.5 x 107 s-1
(B) 0.5 x 107 s-1
(C) 2.0 x 107 s-1 (Correct Answer)
(D) 4.0 x 107 s-1
(E) 5.0 x 108 s-1

Question No.37 (Question Id - 13)
Given that for a certain reaction, Keq at 300 K is 20.0 and ∆H∘ = 100 kJmol-1, the value of Keq for the same reaction at 400 K,
assuming ∆H∘ to be independent of temperature, is closest to :
[R = 8.3 JK-1mol-1]

(A) 20e10 (Correct Answer)
(B) 20e83
(C)

(D) 40e
(E) 20e

Question No.38 (Question Id - 48)
Consider a metal complex where the metal ion is present in a trigonalbipyramidal geometry. In your opinion, which of the
following order according to the energy of d-orbitals is correct ?

(A) dx2 - y2 > dz2 > dxy > dxz = dyz
(B) dz2 > dxy = dx2 -y2 > dxz = dyz (Correct Answer)
(C) dz2 > dxz = dyz > dxy > dx2-y2
(D) dx2-y2 > dxy > dz2 > dxz = dyz
(E) dz2 = dx2-y2 > dxy = dyz = dzx

Question No.39 (Question Id - 11)
For an ideal mixture composed of two components, which of the following is correct ? [x is the mole fraction of one of the
components in the mixture]

(A)

(B)

(C)

(D)

(E)

Question No.40 (Question Id - 36)
Choose the correct set of answers among the following sets :

A. Lowest angle XPX (X = F, Cl or Br) among :
(a) F3PO, (b) Cl3PO, (c) Br3PO

B. Lowest angle XCX (X = F, Cl or CH3) among :
(a) F2C = O, (b) Cl2C = O, (c) Me2C = O

C. Lowest energy of inversion among :
(a) N(CH3)3, (b) P(CH3)3, (c) As(CH3)3

Choose the correct answer from the options given below :

(A) A(a), B(b), C(c)
(B) A(c), B(a), C(b)
(C) A(a), B(b), C(a)
(D) A(a), B(a), C(a) (Correct Answer)
(E) A(b), B(b), C(b)

Question No.41 (Question Id - 3)
Assume an experimental measurement can predict the position of an electron with an accuracy of ±1 x 10-11 m at time t. The
uncertainty in the electron’s position after (t + 10) s would be :

(A) 2.9 x 1011 m
(B) 5.8 x 104 km (Correct Answer)
(C) 6.2 x 107 km
(D) 5.0 x 105 m
(E) 11.6 x 103 m

Question No.42 (Question Id - 46)
Consider you have five complex solution in water, where the concentration of each solution are 0.5 mM.

A. [CoCl4]2-

B. [Co(H2O)6]2+

C. [Cr(H2O)6]3+

D. [Mn(H2O)6]2+

E. [Fe(CN)6]2+

In your opinion, which of the above complex will have highest molar extinction coefficient value for d - d transition ?

(A) A (Correct Answer)
(B) B
(C) C
(D) D
(E) E

Question No.43 (Question Id - 35)
Choose the correct set of answers among following :

A. Highest solubility in water between the following compounds :
(a) CsF, (b) NaF

B. Highest melting point between the following compounds :
(a) AlBr3, (b) MgBr2

C. CsF and NaCl has
(a) 8 : 8 and 6 : 6 coordination geometry, respectively.
(b) 6 : 6 and 6 : 6 coordination geometry, respectively.

Choose the correct answer from the options given below :

(A) A(a), B(b), C(a) (Correct Answer)
(B) A(b), B(a), C(b)
(C) A(b), B(a), C(a)
(D) A(a), B(b), C(b)
(E) A(b), B(b), C(a)

Question No.44 (Question Id - 15)

(A) A=B>C
(B) B < A < C (Correct Answer)
(C) B>C>A
(D) A>B=C
(E) C<B<A

Question No.45 (Question Id - 43)

(A) A > D > C > B (Correct Answer)
(B) D>B>C>A
(C) B>C>D>A
(D) A>C>D >B
(E) D>A>C>B

Question No.46 (Question Id - 42)

(A) (C2H5)4Pb (Correct Answer)
(B) (C2H5)2Pb
(C) Pb2(C2H5)2
(D) (C2H5)6Pb
(E) (C2H5)3PbCl

Question No.47 (Question Id - 9)
The below question has been dropped and full marks are awarded.

A container containing 1.0 mole of an ideal monoatomic gas at 127∘C is expanded reversibly and isothermally from an initial
pressure of 3.0 atm to a final pressure of 1.0 atm. The values of ω, ΔH and ΔSsys for this process are :
[R = 8.3 Jmol-1K-1]

(A) ω = - 9.96 kJ ; ΔH = 0 ; ΔSsys = 24.9 JK-1

(B) ω = - 9.96 kJ ; ΔH = 0 ; ΔSsys = 16.6 JK-1
(C) ω = - 6.64 kJ ; ΔH = 0 ; ΔSsys = 24.9 JK-1
(D) ω = - 3.32 kJ ; ΔH = 0 ; ΔSsys = 24.9 JK-1
(E) ω = - 6.64 kJ ; ΔH = 0 ; ΔSsys = 16.6 JK-1

Question No.48 (Question Id - 33)

(A) A = Proline, B = Alanine, C = Glycine, D = Tryptophan
(B) A = Proline, B = Alanine, C = Tryptophan, D = Glycine
(C) A = Glycine, B = Proline, C = Alanine, D = Tryptophan
(D) A = Alanine, B = Proline, C = Tryptophan, D = Glycine
(E) A = Alanine, B = Proline, C = Glycine, D = Tryptophan (Correct Answer)

Question No.49 (Question Id - 17)

(A) 1S, 6S (Correct Answer)
(B) 1R, 6R
(C) 1R, 6S
(D) 1S, 6R
(E) 1R, 5S

Question No.50 (Question Id - 34)
Choose the correct set of answers among following :

A. Lowest melting point among following compounds :
(a) Si, (b) Ge, (c) Sn

B. A tetrahalide that ‘does not’ exist
(a) SnI4, (b) GeI4, (c) PbI4

C. Which of the following MH4 will react with 0.5 N NaOH ?
(a) CH4, (b) SiH4, (c) GeH4

Choose the correct answer from the options given below :

(A) A(a), B(a), C(c)
(B) A(c), B(b), C(c)
(C) A(c), B(c), C(b) (Correct Answer)
(D) A(b), B(c), C(b)
(E) A(c), B(b), C(b)

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