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NEET Chemistry Solved Question Paper 2014

Multiple Choice Questions

31.

Commercial sample of H₂O₂ is labeled as 10 V. Its % strength is nearly

32.

The 4th higher homologue of ethane is

butane
pentane
hexane
heptane

33.

Among the following, the one which is not a "green house gas", is

N₂O
CO₂
CH₄
O₂

34.

The reagent with which the following reaction is best accomplished is

H₃PO₂
H₃PO₃
H₃PO₄
NaHSO₃

35.

The most likely protonation site in the following molecule is

36.

The order of decreasing ease of abstraction of hydrogen atoms in the following molecule

H_a > H_b > H_c
H_a > H_c > H_b
H_b > H_a > H_c
H_c > H_b > H_a

37.
Among the following statements about the molecules X and Y, the one(s) which correct is (are)

X and Y are diastereomers

X and Y are enantiomers

X and Y are both aldohexoses

X is a D-sugar and Y is an L-sugar

X and Y are enantiomers

X and Y are both aldohexoses

X is a D-sugar and Y is an L-sugar

Both the given molecules contain 6 carbon atoms with an aldehyde group, so these are called aldohexoses. In X, the -OH attached to second last carbon in on right hand side while in Y it is on left hand side, so X is D-sugar and Y is L-sugar. X and Y are the mirror images of each other, i.e., these are enantiomers.

38.

The electronic configuration of Cu is

[Ne] 3s², 3p⁶, 3d⁹, 4s²
[Ne] 3s², 3p⁶, 3d¹⁰, 4s¹
[Ne] 3s², 3p⁶, 3d³, 3d⁹, 4s², 4p⁶
[Ne] 3s², 3p⁶, 3d⁵, 4s², 4p⁴

39.

The rate of a certain reaction is given by, rate = k [H⁺]ⁿ. The rate increases 100 times when the pH changes from 3 to 1. The order (n) of the reaction is