Chemical KineticshardMCQ SINGLE

For a strictly zero order reaction, what is the theoretical ratio of the time required for 75% complChemical Kinetics Chemistry Question

Question

For a strictly zero order reaction, what is the theoretical ratio of the time required for 75% completion ($t_{3/4}$) to the time required for 50% completion ($t_{1/2}$)?

Answer: A

💡 Solution & Explanation

For a zero-order reaction, the time required to consume a fraction $f$ of the initial concentration $[A]_0$ is $t_f = f \times ([A]_0 / k)$. Therefore, $t_{3/4} = 0.75 \times [A]_0 / k$ and $t_{1/2} = 0.50 \times [A]_0 / k$. The ratio $t_{3/4} / t_{1/2} = 0.75 / 0.50 = 1.5$.

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