Question

The rate constant for a first order reaction is $2\times {10}^{-2}mi{n}^{-1}$. The half-life period of reaction is ?

• A. $69.3min.$
• B. $34.65min.$
• C. $17.37min.$
• D. $3.46min.$

Answer 1

The correct option is B $34.65min.$

$t_{1/2}=\frac{0.693}{k}=\frac{0.693}{2\times {10}^{-3}}=34.65min.$