MCQs of Chemical Kinetics

Showing 131 to 140 out of 228 Questions

131.

Which of the following reactions has molecularity and order of reaction identical ?

(a)	${CH}_{3} {COOCH}_{2} {CH}_{3} + H_{2} O \overset{H^{+}}{\to} {CH}_{3} COOH + {CH}_{3} {CH}_{2} OH$
(b)	$N_{2} O_{5} \to 2 {NO}_{2} + \frac{1}{2} O_{2 (g)}$
(c)	$C_{12} H_{22} O_{11} + H_{2} O \overset{Invertase}{\to} C_{6} H_{12} O_{6} + C_{6} H_{12} O_{6}$
(d)	$R - Cl + NaOH \to R - OH + NaCl$

132.

What can never be fractional for a chemical reaction ?

133.

For reaction

H_{2} + {Br}_{2} \to 2 HBr, rate = K [H_{2}] {[{Br}_{2}]}^{\frac{1}{2}}

. Molecularity and order of reaction for this reaction are respectively _____ .

134.

The value of K₀ for a zero order reaction is

2.4 \times 10^{- 2} {Ms}^{- 1}

. If concentration of the reactant is 0.4 M after 4 hours, what will be the initial concentration of the reactant ?

135.

A certain reaction has

K = 4.2 \times 10^{- 2} L^{- 1} mol \min^{- 1}

which statement is correct for such reaction ?

(a)	Its reaction rate decreases as times passes.
(b)	It is a first order reaction and $t_{\frac{1}{2}} = \frac{0.693}{K}$ .
(c)	It is a zero order reaction and follows $t_{\frac{1}{2}} = \frac{{[R]}_{0}}{2 K}$ .
(d)	The graph of $[R] \to t$ is a curve and its slope is equal to $- \frac{K}{2.303}$

136.

The phenomenon of adsorption of NH₃ on finely divided Ni is _____ .

(a)	Heterogeneous system
(b)	a pseudo zero order reaction
(c)	in the beginning it is a first order reaction
(d)	All the given are correct.

137.

State the unit of K for zero order reaction.

138.

For a zero order reaction slope of the graph of

concentration \to time

gives _____ .

139.

The negative value for slope of the graph of concentration of reaction

[R] \to t

indicates _____ .

(a)	first order reaction
(b)	instantaneous rate
(c)	both zero order reaction and instantaneous rate
(d)	zero order reaction

140.

t_{\frac{1}{2}} = 10

minutes for first order reaction. Then time required for 0.08 M to decrease to 0.01 M will be _____ .

Showing 131 to 140 out of 228 Questions