(d)
The reaction is said to be of second order if its reaction rate is determined by the variation of two concentration terms of reactants.
$CH_{3}COOCH_{3} + NaOH \rightarrow CH_{3}COONa + H_{2}O$
Is an example of second order reaction.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.