Q. The unit of the rate of a second order reaction
A) $time^{- 1}$
B) $mol\ L^{- 1}time^{- 1}$
C) $L\ {mol}^{- 1}time^{- 1}$
D) $L^{2}\ {mol}^{- 2}\ time^{- 1}$
Explanation
(c)
$\frac{dA}{dt} = k\lbrack A\rbrack^{2}$
K= reaction rate constant
Then unit of second order reaction rate constant
$k = - \frac{d\lbrack A\rbrack}{dt} \times \frac{1}{\lbrack A\rbrack^{2}}$
$= \frac{1}{s.mol\ L^{- 1}}$
$or\ L\ mol^{- 1}s^{- 1}or\ L\ mol^{- 1}t^{- 1}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.