MCQs of Chemical Kinetics

Chemical Kinetics MCQs

MCQs of Chemical Kinetics

Showing 111 to 120 out of 228 Questions

111.

For some reaction,

rate = K {[A]}^{n} {[B]}^{m}

. If concentration of A is doubled and that of B is halved, what will be the rate of reaction ?

(a)	$(2 n + \frac{1}{2} m)$
(b)	$(n^{2} + m^{\frac{1}{2}})$
(c)	$2^{(n - m)}$
(d)	$\frac{1}{2^{n + m}}$

112.

For the reaction

2 N_{2} O_{5} ⇌ 4 {NO}_{2} + O_{2}

, concentration of NO₂ increases by

5.2 \times 10^{- 3} M

in 100 seconds. The rate of reaction = _____ .

(a)	$1.3 \times 10^{- 5} {Ms}^{- 1}$
(b)	$2.6 \times 10^{- 4} {Ms}^{- 1}$
(c)	$7.6 \times 10^{- 4} {Ms}^{- 1}$
(d)	$1.04 \times 10^{- 3} {Ms}^{- 1}$

113.

For the reaction

A + 2 B \to 2 C, rate = K {[A]}^{\frac{1}{2}} {[B]}^{\frac{3}{2}}

. What will be the effect on the reaction rate if concentration of A is increased to 4 times and that of B to two times ?

(a)	Increases by 4.5 times
(b)	Increases by 5.64 times
(c)	Increases by 4 times
(d)	Increases by 2.82 times

114.

For which type of reaction is the concept of half life period

t_{\frac{1}{2}}

useful ?

(a)	First order
(b)	Second order
(c)	Zero order
(d)	All of the above

115.

Which of the following methods are used to determine rate of the reactions containing more than one type of reactants ? (P) Integrated rate equation method. (Q) Half life time method. (R) Ostwald's isolation method.

(a)	(P) and (Q)
(b)	Only (R)
(c)	(Q) and (R)
(d)	(P), (Q) and (R)

116.

If concentration of the reactant is increased to 'X' times, what will be the value of rate constant K ?

(a)	$K^{- x}$
(b)	$\frac{x}{K}$
(c)	K
(d)	$K x^{- 1}$

117.

For reaction

X_{2 (g)} + Y_{2 (g)} \to 2 X Y_{(g)} the reaction rate = K [X_{2}] [Y_{2}]

. If this reaction is carried out seperately in a 4 litre vessel and 1 litre vessel, their rate ratio = _____ .

(a)	8 : 1
(b)	1 : 16
(c)	16 : 1
(d)	1 : 8

118.

On which of the following does the unit of rate of constant depend ?

(a)	Temperature
(b)	Molecularity of reaction
(c)	Order of reaction
(d)	All of the above

119.

The meaning of order of reaction is _____ .

(a)	The number of molecules of reactants taking part in the reaction.
(b)	The minimum number of molecules required for reaction to occur.
(c)	The number of molecules having maximum concentration.
(d)	Sum of the exponents of concentration terms in rate expression ( rate equation ) .

120.

P \to Q

, if concentration of P is increased by 1.5, reaction rate increases 2.25 times. What is the order of reaction ?

(a)	2.25
(b)	1.5
(c)	2
(d)	2.5

Showing 111 to 120 out of 228 Questions