Back to CHEMICAL KINETICS

JEE CHEMISTRY MCQ: CHEMICAL KINETICS

1 Medium

1 of 1

Analyzing +4 | -1

Statement I For the reaction

\begin{aligned} & 2 \mathrm{KClO}_3 \longrightarrow 2 \mathrm{KCl}+3 \mathrm{O}_2 \\ & \frac{-d\left[\mathrm{KClO}_3\right]}{d t}=\frac{2}{3} \frac{d\left[\mathrm{O}_2\right]}{d t} \end{aligned}

Statement II If average rate of formation of

\mathrm{O}_2

is

0.01 \mathrm{~mol}

\mathrm{min}^{-1}

, rate of disappearance of

\mathrm{KClO}_3

is

0.03 \mathrm{~mol} \mathrm{~min}^{-1}

.

View answer and explanation

Correct option: C

Statement I is correct but Statement II is incorrect

The correct answer is C because Statement I is correct based on the stoichiometry of the reaction, but Statement II is incorrect as the rate of disappearance of KClO₃ should be 0.02 mol min⁻¹ when the rate of formation of O₂ is 0.03 mol min⁻¹.

More Questions from CHEMICAL KINETICS

Practice All Chapter MCQs →

\mathrm{A}_2+\mathrm{B}_2 \rightarrow 2 \mathrm{AB}

follows the mechanism

\begin{aligned} & {{\text{A}}_2}\mathop \rightleftharpoons \limits_{{{\text{k}}_{ - 1}}}^{{{\text{k}}_1}} {\text{A}} + {\text{A (fast) }} \\ & \mathrm{A}+\mathrm{B}_2 \xrightarrow{\mathrm{k}_2} \mathrm{AB}+\mathrm{B} \text { (slow) } \\ & \mathrm{A}+\mathrm{B} \rightarrow \mathrm{AB} \text { (fast) } \end{aligned}

The overall order of the reaction is: For the first order reaction with the rate constant

k

, which expression gives the rate half-life period?

(Initial\mathrm{ }conc.\mathrm{ } = a)

Which of the following is a zero order reaction? For a certain reaction involving a single reactant, it is found that

C_0 \sqrt{T}

is constant, where

C_0

is the initial concentration of the reactant and

T

is the half-life. What is the order of the reaction? Arrhenius equation is The energy of activation for an uncatalysed reaction is

100 \mathrm{~kJ/mol}.

Presence of a catalyst lowers the energy of activation by

75 \%

\log _{10} \frac{K_2}{K_1}

of the ratio of rate constant of catalysed and uncatalysed reactions at

27^{\circ} \mathrm{C}

is?

Assume the frequency factor is same for both reactions. (Given

2.303 \times 8.314=19.147