Chemistry - Chemical Kinetics Question with Solution | TestHub

For an $n^{\text{th }}$ order reaction, $t_{1/2}\propto \frac{1}{C^{n-1}}(C=\text{ initial conc. })$ Hence, for Ist order reaction $(n=1)$, we have $t_{1/2}\propto \frac{1}{C^{1-1}}$ $\therefore t_{1/2}\propto C^0$ Thus half life of Ist order reaction is independent of the initial concentration of reactant.