JEE CHEMISTRY MCQ: CHEMICAL KINETICS

1 Medium

1 of 1

Analyzing +4 | -1

Assertion : The kinetics of the reaction

m A+n B+p C \longrightarrow m^{\prime} X+n^{\prime} Y+p^{\prime} Z

obey the rate expression as

\frac{d X}{d t}=k[A]^m[B]^n

.

Reason : The rate of the reaction does not depend upon the concentration of

C

View answer and explanation

Correct option: A

If both Assertion and Reason are correct and the Reason is the correct explanation of Assertion.

Option A is correct because the rate expression given is consistent with the rate depending only on the concentrations of A and B.

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

\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}

k

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

C_0 \sqrt{T}

C_0

T

100 \mathrm{~kJ/mol}.

75 \%

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

27^{\circ} \mathrm{C}

2.303 \times 8.314=19.147