Q. The unit of rate constant of a third order chemical reaction is
A) ${mol}^{- 1}\ L\ s^{- 1}$
B) ${mol}^{- 1}\ s^{- 2}$
C) $mol\ L\$
D) $s^{- 1}\ {mol}^{- 2}\ L^{2}$
Explanation
(d)
For third order reaction,
$rate = k\lbrack A\rbrack^{3}$
$\frac{mol\ L^{- 1}}{s} = k\left( mol - L^{- 1} \right)^{3}$
$k = \frac{1}{{mol}^{2}\ L^{- 2}\ s}$
$= {mol}^{- 2}\ L^{2}\ s^{- 1}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.