Q. If $E_{f}\ and\ E_{r}$ are the activation energies of the forward and reverse reactions and the reaction is known to be exothermic then
A) $E_{f} < E_{r}$
B) $E_{f} > E_{r}$
C) $E_{f} = E_{r}$
D) No relation can be given between $E_{f}\ and\ E_{r}$ as data are not sufficient
Explanation
(a)
For exothermic reaction, activation energy of reverse reaction is greater than activation energy of forward reaction, $ie,\ E_{f} < E_{r}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.