Question

Assertion : $E_{a}$ of the forward reaction is higher than that of backward reaction in a reversible endothermic reaction.
Reason: Increasing the temperature of the substance increases the fraction of molecules which collide with energies greater than $E_{a}$.

• A. If both assertion and reason are true and reason is the correct explanation of assertion.
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false.
• D. If both assertion and reason are false.

Answer 1

Answer: (B)

Threshold energy of reactants is less than that of products in reversible endothermic reactions hence. $E_{a}$ for forward reaction is more than $E_{a}$ for backward reaction.