Q. Units of rate constant of first and zero order reactions in terms of molarity $M$ unit are respectively
A) $s^{- 1},\ M\ s^{- 1}$
B) $s^{- 1},\ M$
C) $M\ s^{- 1},\ s^{- 1}$
D) $M,\ s^{- 1}$
Explanation
(a)
For $nth$ order reaction
$k = \left( mol\ L^{- 1} \right)^{1 - n}\ s^{- 1}$
For Ist order reaction
Unit of $k = s^{- 1}$
For zero order reaction
Unit of $k = mol\ L^{- 1}\ s^{- 1} = M\ s^{- 1}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.