Q. The half-life period of a first order reaction is 1 min 40 s. Calculate its rate constant.
A) $6.93 \times 10^{- 3}min^{- 1}$
B) $6.93 \times 10^{- 3}s^{- 1}$
C) $6.93 \times 10^{- 3}s$
D) $6.93 \times 10^{3}s$
Explanation
(c)
$t_{1/2} = 100s$
$k = \frac{0.693}{t_{1/2}} = \frac{0.693}{100}$
$k = 6.93 \times 10^{- 3}s^{- 1}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.