Question

$t_{\frac{1}{2}}$ for first order reaction is:

• A. $\frac{0.7}{k}$
• B. $\frac{0.693}{k}$
• C. $\frac{0.683}{k}$
• D. $\frac{0.10}{k}$

Answer 1

The correct option is B $\frac{0.693}{k}$

We know, for first order reaction,

$t_{1/2}=\frac{0.693}{k}$

Hence, option B is correct.