Q. For a first order reaction $k = 100\ s^{- 1}.$ The time for completion of 50% reaction is
A) 1 milli-second
B) 4 milli-second
C) 7 mili-second
D) 10 milli-second
Explanation
(c)
$t_{50\%} = \frac{0.693}{k} = \frac{0.693}{100}\ s$
$\ = 0.693 \times 10^{- 3}\ s$
$\ \approx 7\$milli second
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.