Question

For an exothermic reaqction, the energy of activation of the reactants is
A. equal to the energy of activation of products
B. less than the energy of activation of products
C. greater than energy of activation of products
D. sometimes greater and fsometimes less then that of the products

Answer 1

Correct Answer - B
Consider the diagram showing plot of potential energy vs reaction coordinate for an exothermic reaction:

For a reaction
`Delta_(r)H^(Ɵ)=(E_(a))_(b)`
For an exothermic reaction.
`Delta_(r)H^(Ɵ)is-ve`
Thus `(E_(a))_(f)lt(E_(a))_(b)`