Question

In the first order reaction the relation between the velocity constant $(k_1)$ and half-life period $(t_{1/2})$ is

• A. $t_{1/2} = \frac{0.693}{k_1}$
• B. $k_1 = \frac{t_{1/2}}{0.693}$
• C. $t_{1/2} = 0.693 + k_1$
• D. $t_{1/2} = \frac{k_1}{0.693}$

Answer 1

Answer: (A)

For first order reaction, half-life period,
$ t_{1/2} = \frac{0.693}{k_1}$