Question

The rate constant for a first order reaction is $2 \times 10^{- 2}\min^{- 1}{}$ the half life period of reaction is

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

Answer 1

Answer: (B)

$34.65\min$

Answer 2

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