MCQs of Chemical Kinetics

Chemical Kinetics MCQs

MCQs of Chemical Kinetics

Showing 51 to 60 out of 228 Questions

51.

If the concentration of a reactant is increased by 4 times, the reaction rate becomes double. If the concentration of the same reactant is increased 9 times, what will be its reaction rate ?

(a)	4.5 times
(b)	3 times
(c)	9 times
(d)	8 times

52.

The reaction

A \to 2 B + C

is a second order reaction. If concentration of A is doubled, the rate of formation of B will _____ .

(a)	increases 8 times
(b)	increases $\frac{1}{2}$ time
(c)	increases 2 times
(d)	increases 4 times

53.

At identical temperature the reaction :

$2 {SO}_{2 (g)} + O_{2 (g)} ⇌ 2 {SO}_{3 (g)}$ is carried out in 1 L vessel and 2 L vessel separately. The ratio of their rates will be _____ .

(a)	4 : 1
(b)	8 : 1
(c)	1 : 8
(d)	1 : 4

54.

For first order reaction of

t_{50 %}

= 14 sec. When concentration of reactant is decrease in

\frac{1}{8}

times than what time is required ?

(a)	42 s
(b)	28 s
(c)	140 s
(d)	56 s

55.

What is rate of reaction order of the following reaction ? Rate =

K {[X]}^{\frac{4}{5}} {[Y]}^{\frac{1}{5}}

(a)	1
(b)	$\frac{6}{5}$
(c)	$\frac{5}{6}$
(d)	$\frac{4}{5}$

56.

In first order reaction half life time is 5 and how much reactant is remaining ?

(a)	$\frac{1}{5}$
(b)	$\frac{1}{32}$
(c)	$\frac{1}{50}$
(d)	32

57.

{}_{86}^{226}{Ra} \to {}_{84}^{222}{Rn} + \frac{4}{2} He

order of reaction is _____

(a)	0
(b)	1^st
(c)	2^nd
(d)	3^rd

58.

Adsorption of NH₃ on the surface of powder of Ni. Which type of reaction ?

(a)	Heterogenous
(b)	Pseudo first order
(c)	First order
(d)	All

59.

E_{a} = 0, At 27^{0} C, K_{1} = 9 \times 10^{7} \min^{- 1} . At 47^{0} C, K_{2} =_____

(a)	0
(b)	$3 \times 10^{7} \min^{- 1}$
(c)	$9 \times 10^{7} \min^{- 1}$
(d)	Infinite

60.

t_{0.5}

= 30 of first order of reaction, than what time is required for complete

\frac{1}{32}

of reaction ?

(a)	150 s
(b)	33.33 s
(c)	90 s
(d)	300 s

Showing 51 to 60 out of 228 Questions