Which of the following is true for an exothermic reaction A`hArr`B if E, and `E_(b)`are the activation enegries of formard and backward reactions respectively?

Options

A. `E_(f)gtE-(b)`
B. `E_(f)=E_(b)`
C. `E_(f)=-E_(b)`
D. `E_(f)ltE_(b)`

Answer

D

Explanation

The enthalphy change of the chemical reaction is given by, `Delta_(r)H=E_(f)-E_(b)`
Where ,`E_(f)E_(b)` are the activation energies for forward and backword reactions respectively
For exothermic reaction `Delta_(r)Hlt0`
`thereforeE(f)ltE_(b)`