Question

The activation energy for a simple chemical reaction `A rarr B` is `E_(a)` in the forward reaction: The activation of the reverse reaction
A. can be less than or more than `E_(alpha)`
B. is always double of `E_(alpha)`
C. is negative of `E_(a)`
D. is always less than `E_(a)`

Answer 1

Correct Answer - A
the energy of activation of reverse reaction is less than or more than energy of activation `(E_(a))` of forward reaction .
`therefore Delta H=(E_(a))_(F)-(E_(a))_(R)`
because it depands upon the nature of reactionn
`if (E_(a))_(F)gt (E_(a))_(R)` reaction is endothermic
`or (E_(a))_(R),` Reaction is exothermic .