Chemical Kinetics Question 324

Question: For a first order reaction, rate constant is $ 0.6932h{r^{-1}} $ , then half-life for the reaction is [Bihar MEE 1997]

Options:

A) $ 0.01hr $

B) $ 1hr $

C) $ 2hr $

D) $ 10hr $

E) $ 0.1hr $

Show Answer

Answer:

Correct Answer: B

Solution:

$ {t_{1/2}}=\frac{0.693}{k}=\frac{0.693}{0.6932h{r^{-1}}}=1hr $ .