List of top Chemistry Questions on Activation energy asked in MET

\(\mathrm{N}_2 + 3\mathrm{H}_2 \longrightarrow 2\mathrm{NH}_3; + 22\mathrm{kcal}\)
The activation energy for the forward reaction is \(50\mathrm{kcal}\). What is the activation energy for the backward reaction?

The activation energy of exothermic reaction $A→ B$ is 80 kJ $mol^-1$. The heat of reaction is 200 kJ $mol^-1$. The activation energy for the reaction $B→ A$ (in kJ $mol^-1$) will be ________.