Vpm classes mock gate chemistry

For IIT-JAM, JNU, GATE, NET, NIMCET and Other Entrance Exams

MOCK GATE - CHEMISTRY
1. Which among the following molecules belong to point group C4v ?
(A) [BF4] Na+ (B) XeOF4 (C) XeF4 (D) [PtCl4]2–

1 1
2. The 19F NMR spectrum of PCl2F3 (I for 31P = , I for 19F = ) shows
2 2
(A) two triplets and two doublets (B) two triplets and one doublet
(C) two doublets and one triplet (D) three triplets and one doublet
3. The compound (SiH3)3N is expected to be
(A) pyramidal and more basic than (CH3)3N (B) planar and less basic than (CH3)3N
(C) pyramidal and less basic than (CH3)3N (D) planar and more basic than (CH3)3N
4. Arrange the following in the decreasing order of acidity of the hydrogen indicated in italics.
(i) CH3COCH3 (ii) CH3COCH2COCH3 (iii) CH3COCH2COOCH3 (iv) CH3COCH2NO2
(A) (ii) > (iii) > (i) > (iv) (B) (iv) > (ii) > (iii) > (i) (C) (iv) > (iii) > (ii) > (i) (D) (ii) > (iv) > (iii) > (i)
5. The complex with maximum CFSE is
(A) [CoCl4]2– (B) [Co(H2O)6]3+ (C) CoF3(H2O)3 (D) [CoF6]3+

6. The compound which has four metal-metal bonds is
(A) Fe2(CO)9 (B) Co2(CO)8 (C) [Re2Cl8]2– (D) [Ru3(CO)]12

7. The complex with spin-only magnetic moment of ~ 4.9 B.M. is
(A) [Fe(H2O)6]2+ (B) [Fe(CN)6]3– (C) [Fe(CN)6]4– (D) [Fe(H2O)6]3+

8. For the reaction shown below if the concentration of KCN is increased four times, the rate of the reaction will be

aq. MeOH
 →
+ KCN + KCl
(A) doubled (B) increased four times (C) unaffected (D) halved
9. The system for which energy (E) increases quadratically with the quantum number (n) is
(A) particle-in-a-one dimensional box (B) hydrogen atom
(C) one dimensional harmonic oscillator (D) rigid rotor
10. Among the following orbitals of a diatomic molecule, the bonding one is
(A) 1 σu (B) 2 σu (C) 1 πu (D) 1 πg
11. Benzyl chloride is reacted with different nucleophiles shown below. Arrange them in the decreasing order of
reactivity.
HOΘ , CH3 COO Θ , PhO Θ , CH3O Θ Nucleophiles :
Θ Θ Θ Θ Θ Θ Θ Θ
(A) CH3 O > HO > PhO > CH3COO (B) HO > CH3 O > PhO > CH3COO
Θ Θ Θ Θ Θ Θ Θ Θ
(C) HO > PhO > CH3 O > CH3COO (D) CH3 COO > CH3O > HO > PhO
12. In comparison to the frequency of the EPR transition, the NMR transition frequency is
(A) much higher (B) much lower (C) almost same (D) none of these
13. The symmetry point group of the BF3 molecule is
(A) C3v (B) D3h (C) C2v (D) D2h
14. For an irreversible adiabatic expansion of a perfect gas from volume Vi to Vf, the change in entropy of the gas is

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 Vf 
(A) nR ln   (B) zero (C) less than zero (D) greater than zero
 Vi 
15. For the cell Ag(s) | AgCl(satd.), NaCl(aq, m2), AgCl(satd.) | Ag(s) where m1 and m2 are different molalities (m1 >
m2), the standard cell potential is
 m1   a1 
(A) –RT ln   (B) zero (C) –RT ln   (D) –FRT ln (a1)
 m2   a2 
16. The rate of nitration of the following aromatic compounds decreases in the order
(i) benzene (ii) pyridine (iii) thiophene (iv) toluene
(A) (iv) > (i) > (iii) > (ii) (B) (iii) (iv) > (i) > (ii) (C) (iii) > (ii) > (i) > (iv) (D) (ii) > (i) > (iv) > (iii)
17. For the reaction : Br2 (g) + BF2(g) → 2BrF3(g), the equilibrium constant at 2000 K and 1.0 bar is 5.25. When the
pressure is increased by 8-fold, the equilibrium constant
(A) increases by a factor of 1.86 (B) decreases by a factor of 1.86
(C) remains same (D) increases by a factor of 8
18. 2-Phenyl ethanol may be prepared by the reaction of phenyl magnesium bromide with

(A) HCHO (B) CH3CHO (C) CH3COCH3 (D)
19. o-Chlorotoluene reacts with sodamide in liquid ammonia to give o-toluidine and m-toluidine. This reaction
proceeds through an intermediate

(A) (B) (C) (D)
20. The number of signals observed in 1H NMR spectrum of 3, 5-dibromotoluene is
(A) 3 (B) 4 (C) 2 (D) 6
21. Benzaldehyde can be prepared by reacting phenylmagnesium bromide with
(A) N, N-dimethylformamide (B) carbon dioxide
(C) formaldehyde (D) ethyl chloroformate
22. Proteins are biopolymers. The monomer units present in them are
(A) carbohydrates (B) amino acids (C) fatty acids (D) alkenes
23. Among the bromides I-III given below, the order of their reactivity in the SN1 reaction is

(I) (II) (III)
(A) III > II > I (B) II > III > I (C) III > I > II (D) II > I > III
24. Reaction of phenyl acetate with anhydrous aluminium chloride generates a mixture of
(A) ortho-, meta- and para-hydroxyacetophenones
(B) meta- and para-hydroxyacetophenones
(C) ortho- and meta-hydroxyacetophenones
(D*) ortho- and para-hydroxyacetophenones
25. The major product formed in the reaction of anisole with lithium, liquid ammonia and t-butanol is
(A) 1-methoxycyclohexa-1, 4-diene (B) 2-methoxycyclohexa-1, 3-diene
(C) 1-methoxycyclohexa-1, 3-diene (D) 3-methoxycyclohexa-1, 4-diene



26. The major product formed in the reaction of 1, 3-butadiene with bromine is
(A) BrCH2CH(Br)CH = CH2 (B) CH2 = CH – CH2CH2Br
(C) CH2 = C(Br) – C(Br) = CH2 (D) BrCH2CH = CHCH2Br
27. The spacing between the rotational lines of HF is 40 cm –1. The corresponding spacing between the rotational
lines in DF is approximately
(A) 20 cm–1 (B) 30 cm–1 (C) 60 cm–1 (D) 7.5 cm–1
28. The activation energy for the decomposition of H2O2 is 76 kJ/mol at room temperature and the decomposition is
very slow. When a little iodide is added, the activation energy decreases to 57 kJ mol–1. The rate coefficient
increases approximately by a factor of
(A) 500 (B) 1000 (C) 2000 (D) 50
29. The reaction of (+) 2-iodobutane and Nal* (I* is radioactive isotope of iodine) in acetone was studied by
measuring the rate of racemization (kr) and the rate of incorporation of I* (ki).
( + ) CH3CH ( I) CH2CH3 + Nal* → CH3CH ( I* ) CH2CH 3 + Nal
For this reaction, the relationship between kr and ki is
 1  1
(A) ki = 2 × kr (B) ki =   × kr (C) ki = kr (D) ki =   × kr
2 3
30. The force between two electrons separated by 0.1 nm in vacuum (ε0 = 8.854 × 10 J C–2 m–1) is
–12 –2

(A) 2.31 × 10–8 N (B) –2.31 × 10–8 N (C) –1.15 × 10–8 N (D) 1.155 × 10–8 N
31. I II
(P) ZnSO4(aq) + K4[Fe(CN)6](aq) → Products (1) Enzymatic reaction
(Q) Zn(s) + CuSO4(aq) → Products (2) Chain reaction
∆
(R) H2 + Cl2 → Products (3) Redox reaction
(S) Fischer-Tropsch synthesis of hydrocarbons (4) Precipitation reaction
(5) Surface reaction
(6) Hydrolysis reaction
(A) P-2, Q-4, R-5, S-6 (B) P-1, Q-3, R-2, S-4 (C) P-4, Q-3, R-2, S-5 (D) P-1, Q-6, R-2, S-5
32. I II
(P) Supporting electrolyte (1) Overpotential
(Q) Zn(Hg)a = 1 |ZnCl2 (aq) | Zn(Hg)Q = 2 (2) Residual current
(R) Inversion temperature (3) Electrolyte concentration cell
(S) Entropy of vapourisation (4) Electrode concentration cell
(5) Trouton’s rule
(6) Joule-Thomson expansion
33. I II
(P) Kroenecker delta (1) Electronic transition
(Q) Franck-Condon principle (2) Isothermal process
(R) Kirchoff’s equation (3) Orthonormal set
(S) Glass transition temperature (4) Reaction enthalpy
(5) Turnover number
(6) Polymer
34. I II
(P) Liver alcohol dehydrogenase (1) Cu at the active site
(Q) Cytochrome C oxidase (2) Fe and Cu at the active site
(R) Hemocyanin (3) Zn at the active site



(S) Myoglobin (4) Fe at the active site
(5) Mo at the active site
(6) Cu and Zn at the active site

35. I II
(P) (PPh3)3RhCl (1) Friedel-Crafts catalyst
(Q) [Rh(CO)2I2] (2) Hydroformylation of alkenes
(R) [PdCl4]2 (3) Hydrogenation catalyst
(S) [HCo(CO)4] (4) The Wacker process
(5) Monsanto catalyst for acetic acid
(6) Reppe catalyst

36. I II
(P) [Cr(H2O)6]3+ (1) C3v
(Q) Fe2(CO)9 (2) D3h
(R) Eclipsed ferrocene (3) Oh
(4) D3d
(5) D5h
(6) D4h
(A) P-3, Q-2, R-5 (B) P-2, Q-4, R-1 (C) P-6, Q-2, R-5 (D) P-3, Q-6, R-4

37.
In the scheme shown above (P) , (Q) , (R) and (S) are
(A) (P) = purine bases , (Q) pyrimidine bases (R) = nucleotides , (S) = nucleosides
(B) (P) = (Q) = nucleotides , (R) = pyrimidine bases, (S) = purine bases
(C) (P) = nucleotides ,(Q) = nucleotides , (R) = (S) = purine bases
(D) (P) = nucleotides , (Q) = nucleotides , (R) = pyrimidine bases, (S) = purine bases

38. Among CH3Cl, CH2Cl2 CHCl3, CH3Br and CH3I in the gaseous state, the one having highest molar entropy value
at room temperature is
(A) CHCl3 (B) CH3Cl (C) CH3Br (D) CH3I

39. The products obtained from the following reaction are

(A) (B)

(C) (D)

40. H2 and Br2 react to give HBr by the following steps



k1
 →
Br2 + M ← 2Br + M (fast), (K = k1/k–1)

k –1
k2
Br + H2  HBr + H (slow)
→
k3
H + Br2  HBr + Br (fast)
→
The probable rate law for the above sequence is
(A) rate = k2 (K)1/2 [H2][Br2]1/2 (B) rate = k2 [H2] [Br2]
(C) rate = k2 (k1)1/2 [H2][Br2]1/2 (D) rate = k2 (K)1/2 [H2] [Br]1/2

41. The solubility product of silver sulphate at 298 K is 1.0 × 10–5. If the standard reduction potential of the half-cell
Ag+ + e → Ag is 0.80 V, the standard reduction potential of the half-cell Ag2SO4 + 2e → 2Ag + SO42– is
(A) 0.15 V (B) 0.22 V (C) 0.65 V (D) 0.95 V

42. The product (s) otained in the following reaction is (are)

∆
→

O H

(A) + (B)

O H O H
–––

O H

(C) (D)

43. One mole of an ideal gas (CV = 1.5 R) at a temperature 500 K is compressed from 1.0 atm to 2.0 atm by a
reversible isothermal path. Subsequently, it is expanded back to 1.0 atm by a reversible adiabatic path. The
volume of the final state in litre is
(A) 15.6 (B) 20.5 (C) 31.1 (D) 41.0
44. The vapour pressures of the pure components P and Q are 700 Torr and 500 Torr, respectively. When the two
phases are in equilibrium at 1.0 atm, the mole fraction of P in the liquid phase is 0.6 and in the vapour phase
0.4. The activity co-efficient of component P in the solution on the basis of Raoult’s law is
(A) 0.60 (B) 0.72 (C) 0.92 (D) 1.01
45. Match the isoelectric points with the amino acids
Amino acid Isoelectric point
(X) H2 NCH2 COOH (I) 9.5
(Y) HOOCCH2 CH2 CH(NH2) COOH (II) 6.0
(Z) H2N(CH2) 4 CH(NH2) COOH (III) 3.1
(A) (X) – (II), (Y) – (III), (Z) – (I) (B) (X) – (III), (Y) – (I), (Z) – (II)
(C) (X) – (I), (Y) – (II), (Z) – (III) (D) (X) – (II), (Y) – (I), (Z) – (III)
46. The most populated rotational state for HCl (B = 8.5 cm–1) at 300 K is
(A) 2 (B) 3 (C) 5 (D) 7



47. The ratio of life times of two states that give rise to line widths of 1.0 cm–1 and 0.2 cm–1 respectively is
(A) 1 : 2 (B) 1 : 5 (C) 2 : 1 (D) 5 : 1

48. The metal-ion along with its oxidation state and the number of unpaired electron present are
(A) Fe(II) and 4 (B) Mn(II) and 5 (C) Fe(III) and 1 (D) Fe(III) and 5
49. The complex is
(A) [Mn(H2O)6]2+ (B) [Fe(CN)6]3– (C) [Fe(H2O)6]2+ (D) [Fe(H2O)6]3+

50. The compound [X] is

(A) (B)

(C) (D)

51. The compound [Y] is

(A) and (B) and

(C) and (D) and

52. The compound [X] is

(A) (B) (C) (D)

53. The compound [Z] is

(A) (B)

(C) (D)

54. The compound having the highest melting point is
(A) LiCl (B) LiF (C) LiI (D) LiBr



55. The shape of SF4 is
(A) tetrahedral (B) trigonal bipyramidal (C) square planar (D) octahedral

56. 25 persons are in a room. 15 of them play hockey, 17 of them play football and 10 of them play both hockey and
football. Then the number of persons playing neither hockey nor football is :
(A) 2 (B) 17 (C) 13 (D) 3

57. Choose the most appropriate word from the options given below to complete the following sentence :
If we manage to ______________ our natural resources, we would leave a better planet for out children.
(A) uphold (B) restrain (C) cherish (D) conserve

58. The question below consists of a pair of related words followed by four pairs of words. Select the pair that best
expresses the relation in the original pair.
Unemployed : Worker
(A) fallow : land (B) unaware : sleeper (C) wit : jester (D) renovated : house
59. Which of the following options is the closest in meaning to the word below :
Circuitous
(A) cyclic (B) indirect (C) confusing (D) crooked
60. Choose the most appropriate word from the options given below to complete the following sentence :
His rather casual remarks on politics _____________ his lack of seriousness about the subject.
(A) masked (B) belied (C) betrayed (D) suppressed
61. Hari (H), Gita (G), Irfan (I) and Saira (S) are siblings (i.e. brothers and sisters). All were born on 1st January. The
age difference between any two successive siblings (that is born one after another) is less than 3 years. Given
the following facts :
(i) Hari’s age + Gita’s age > Irfan’s age + Saira’s age.
(ii) The age difference between Gita and Saira is 1 year. However, Gita is not the oldest and Saira is not the
youngest.
(iii) There are no twins.
In what order were they born (oldest first) ?
(A) HSIG (B) SGHI (C) IGSH (D) IHSG
62. 5 skilled workers can build a wall in 20 days; 8 semi-skilled workers can build a wall in 25 days; 10 unskilled
workers can build a wall in 30 days. If a team has 2 skilled, 6 semi-skilled and 5 unskilled workers, how long will
it take to build the wall ?
(A) 20 days (B) 18 days (C) 16 days (D) 15 days
63. Modern warfare has changed from large scale clashes of armies to suppression of civilian populations.
Chemical agents that do their work silently appear to be suited to such warfare and regretfully, there exist
people in military
establishments who think that chemical agents are useful tools for their cause.
Which of the following statements best sums up the meaning of the above passage :
(A) Modern warfare has resulted in civil strife.
(B) Chemical agents are useful in modern warfare.
(C) Use of chemical agents in warfare would be undesirable.
(D) People in military establishments like to use chemical agents in war.
64. Given digits 2, 2, 3, 3, 3, 4, 4, 4, 4 how many distinct 4 digit numbers greater than 3000 can be formed ?
(A) 50 (B) 51 (C) 52 (D) 54

65. If 137 + 276 = 435 how much is 731 + 672 ?
(A) 534 (B) 1403 (C) 1623 (D) 1513



Answer key
Question. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Answer. B A B B B C A C A C A A B D B A C B B B
Question. 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
Answer. A B A D A D A C B A C A B B A A D A B A
Question. 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
Answer. D C C B A B B D D B B B D B A D D A B C
Question. 61 62 63 64 65
Answer. B D C B C


Vpm classes mock gate chemistry

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Vpm classes mock gate chemistry