VIT
Engineering Entrance Exam
Solved Paper-2013
Chemistry
1. Treating anisole with the following reagents, the major product obtained is
(CH3)3 CCl, AlCl3 II. Cl2, FeCl3
(a)
(b)
(c)
(d)
2. Ketones where, R=R′ = alkyl group can be obtained in one step by
(a) hydrolysis of esters
(b) oxidation of primary alcohols
(c) oxidation of secondary alcohols
(d) reaction of acid halide with alcohols
3. An optically active compound ‘X’ has molecular formula C4H8O3. It evolves CO2 with aqueous NaHCO3. ‘X’ reacts with LiAlH4 to give an achiral compound. ‘X’ is
(a)
(b)
(c)
(d)
4. is/are
(a)
(b)
(c) Both (a) and (b)
(d) None is correct
5. A and B respectively are
(a)
(b)
(c)
(d)
6.Phenol is heated with phthalic anhydride in the presence of conc. H2SO4. The product gives pink colour with alkali. The product is
(a) phenolphthalein
(b) bakelite
(c) salicylic acid
(d) flurorescein
7. Z is identified as
(a)
(b)
(c)
(d)
8. B can be obtained from halide by van-Arkel method. This involves reaction
(a)
(b)
(c) Both (a) and (b)
(d) None of the above
9. NH4Cl(s) is heated in a test tube. Vapours are brought in contact with red litmus paper, which changes it to blue and then to red. It is because of
(a)
(b)
(c)
(d)
10. Out of H2S2O3, H2SO4, H2SO5 and H2S2O8 peroxy acids are
(a)
(b)
(c)
(d)
11. The density of solid argon is 1.65 g per cc at −233℃. If the argon atom is assumed to be a sphere of radius 1.54 × 10−8 cm, what percent of solid argon is apparently empty space? (Ar = 40)
(a) 16.5%
(b) 38%
(c) 50%
(d) 62%
12. When 1 mole of CO2(g) occupying volume 10 L at 27℃ is expanded under adiabatic condition, temperature falls to 150 K. Hence, final volume is
(a) 5 L
(b) 20 L
(c) 40 L
(d) 80 L
13. Acid hydrolysis of ester is first order reaction and rate constant is given by
where, V0, Vt and V∞ are the volume of standard NaOH required to neutralize acid present at a given time, if ester is 50% neutralized then
(a)
(b)
(c)
(d)
14. A near UV photon of 300 nm is absorbed by a gas and then re-emitted as two photons. One photon is red with wavelength 760 nm. Hence wavelength of the second photon is
(a) 1060 nm
(b) 496 nm
(c) 300 nm
(d) 215 nm
15. Which of these ions is expected to be coloured in aqueous solution?
I. Fe3+ II. Ni2+ III. Al3+
(a) I and II
(b) II and III
(c) I and III
(d) I, II and III
16. Select the correct statement (s).
(a) LiAlH4 reduces methyl cyanide to methyl amine
(b) Alkane nitrile has electrophilic as well as nucleophilic centres
(c) Saponification is a reversible reaction
(d) Alkaline hydrolysis of methane nitrile forms methanoic acids
17.
The product Y is
(a) p-chloro nitrobenzene
(b) o-chloro nitrobenzene
(c) m-chloro nitrobenzene
(d) o, p-dichloro nitrobenzene
18. End product of the following reaction is
(a)
(b)
(c)
(d)
19. Following compounds are respectively geometrical isomers
(a) cis cis trans
(b) cis trans trans
(c) trans cis cis
(d) cis trans cis
20. Which is more basic oxygen in an ester?
(a) Carbonyl oxygen, α
(b) Carboxyl oxygen, β
(c) Equally basic
(d) Both are acidic oxygen
21. In a Claisen condensation reaction (when an ester is treated with a strong base)
(a) a proton is removed from the α-carbon to form a resonance stabilized carbanion of the ester
(b) carbanion acts as a nucleophile in a nucleophilic acyl substitution reaction with another ester molecule
(c) a new C―C bond is formed
(d) All of the above statements are correct
22. An organic compound B is formed by the reaction of ethyl magnesium iodide with a substance A, followed by treatment with dilute aqueous acid. Compound B does not react with PCC or PDC in dichloromethane. Which of the following is a possible compound of A?
(a)
(b)
(c)
(d)
23.
A formed in this reaction is
(a)
(b)
(c)
(d)
24. For the cell reaction, 2Ce4+ + Co → 2Ce3++Co3+; E°cell is 1.89 V. If is −0.28 V, what is the value of ?
(a) 0.28 V
(b) 1.61 V
(c) 2.17 V
(d) 5.29 V
25. A constant current of 30 A is passed through an aqueous solution of NaCl for a time of 1.00 h. What is the volume of Cl2 gas at STP produced?
(a) 30.00 L
(b) 25.08 L
(c) 12.54 L
(d) 1.12 L
26. Consider the following reaction,
The reaction is of first order in each diagram, with an equilibrium constant of 104. For the conversion of chair form to boat form at 398 K with p re-exponential factor of 1012 s−1. Apparent rate constant (=kA/kB) at 298 K is
(a) 4.35 × 104 s−1
(b) 4.35 × 108 s−1
(c) 4.35 × 10−8 s−1
(d) 4.35 × 1012 s−1
27. If for the cell reaction, Zn + Cu2+ ⇌ Cu + Zn2+; entropy change ∆S° is 96.5 J mol−1K−1, then temperature coefficient of the emf of a cell is
(a) 5 × 10−4 VK−1
(b) 1 × 10−3 VK−1
(c) 2 × 10−3 VK−1
(d) 9.65 × 10−4 VK−1
28. What transition in the hydrogen spectrum would have the same wavelength as the Balmer transition, n = 4 to n = 2 of He+ spectrum?
(a) n = 4 to n = 2
(b) n = 3 to n = 2
(c) n = 2 to n = 1
(d) n = 4 to n = 3
29. What is the degeneracy of the level of H-atom that has energy
(a) 16
(b) 9
(c) 4
(d) 1
30. Match the following and choose the correct option given below.
(a) A-I, B-II, C-IV, D-III
(b) A-II, B-III, C-I, D-III
(c) A-IV, B-III, C-II, D-I
(d) A-IV, B-II, C-III, D-I
31. Which of the following ligands is tetradentate?
(a)
(b)
(c)
(d)
32. What is the EAN of [Al(C4O4)3]3−?
(a) 28
(b) 22
(c) 16
(d) 10
33. Which of the following does not undergo benzoin condensation?
(a)
(b)
(c)
(d)
34.
is with the product
(a) CO2
(b)
(c) Both (a) and (b)
(d) None of the above
35. Benzene diazonium chloride on treatment with hypophosphorous acid and water yield benzene. Which of the following is used as a catalyst in this reaction?
(a) LiAlH4
(b) Red P
(c) Zn
(d) Cu+
36. Consider the following reaction sequence,
Isomers are
(a) C and E
(b) C and D
(c) D and E
(d) C, D and E
37. When a monosaccharide froms a cyclic hemiacetal, the carbon atom at that contained the carbonyl group is identified as the ……. carbon atom, because.
(a) D, the carbonyl group is drawn to the right
(b) L, the carbonyl group is drawn to the left
(c) acetal, it forms bond to an ―OR and an ―OR
(d) anomeric, its substituents can assume an α or β position
38. Which of the following is/are α-amino acid?
(a)
(b)
(c) Both (a) and (b)
(d) None of these
39. Calculate pH of a buffer prepared by adding 10 mL of 0.10 M acetic acid to 20 mL of 0.1 M sodium acetate [pKa(CH3COOH) = 4.74]
(a) 3.00
(b) 4.44
(c) 4.74
(d) 5.04
40. The equivalent conductance of silver nitrate solution at 250℃ for an infinite dilution was found to be 133.3 Ω−1 cm2 equiv−1. The transport number of Ag+ ions in very dilute solution of AgNO3 is 0.464. Equivalent conductances of Ag+ and NO3− (in Ω−1 cm2 equiv−1) at infinite dilution are respectively
(a) 195.2, 133.3
(b) 61.9, 71.4
(c) 71.4, 61.9
(d) 133.3, 195.2
Latest Govt Job & Exam Updates: