Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

JEE Chemistry Solved Question Paper 2014

Multiple Choice Questions

31.

Among the following structures the one which is not a resonating structure of others is

32.

Among the following compounds, the one(s) that gives (give) effervescence with aqueous NaHCO₃ solution is (are)

(CH₃CO)₂ O CH₃COOH PhOH CH₃COCHO

I II III IV

I and II
I and III
Only II
I and IV

33.

The 4th higher homologue of ethane is

butane
pentane
hexane
heptane

34.

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

N₂O
CO₂
CH₄
O₂

35.

Metal ion responsible for the Minimata disease is

Co²⁺
Hg²⁺
Cu²⁺
Zn²⁺

36.

The most likely protonation site in the following molecule is

37.

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

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

38.

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

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

2

0

1

1.5

$Given, rate = k [H^{^{+}}]^{n} Initial pH = 3 so [H^{^{+}}] = 1 \times 10^{- 3}, initial rate = r_{1} Final pH = 1 so [H^{^{+}}] = 1 \times 10^{- 1}, final rate = r_{2} = 100 r_{1} On substituting value we get r_{1} = k [1 x 100^{- 3}]^{n} . . . . . . . . . (i) r_{2} = 100 r_{1} = k [10^{- 1}]^{n} . . . . . . . . . . (ii) Dividing eqs (i) by (ii), \frac{r_{1}}{100 r_{1}} = {[\frac{1 \times 10^{- 3}}{1 \times 10^{- 1}}]}^{n} \frac{1}{100} = {[\frac{10^{- 2}}{1}]}^{n} \Rightarrow {[\frac{1}{100}]}^{1} = {[\frac{1}{100}]}^{n} n = 1$