Question

Disintegration constant for a radioactive substance is $0.58h{r}^{-1}$. Its half-life period

• A. 8.2 hr
• B. 5.2 hr
• C. 1.2 hr
• D. 2.4 hr

Answer 1

The correct option is C 1.2 hr

$K=\frac{0.693}{t_{\frac{1}{2}}}$
$t_{\frac{1}{2}}-\frac{0.693}{K}-\frac{0.693}{0.58}\Rightarrow 1.2hrs$