Consider the following reaction $A \longrightarrow$ Products This reaction is completed in $100…
Consider the following reaction
$A \longrightarrow$ Products
This reaction is completed in $100 \mathrm{~min}$. The rate constant of this reaction at $t_1=10$ $\mathrm{min}$, is $10^{-2} \mathrm{~min}^{-1}$. What is the rate constant $\left(ight.$ in $\min ^{-1}$ ) at $t_2=20 \mathrm{~min} ?$
$2 \times 10^{-2}$
$10^{-2}$
$5 \times 10^{-3}$
$0.1$
Solution
For a first order reaction, rate constant does not depend upon concentration.
$\therefore$ Rate constant at $t_2=20 \mathrm{~min}$ also $10^{-2} \mathrm{~min}^{-1}$ (constant).