Assertion (A) The enthalpy of reaction remains constant in the presence of a catalyst.
Reason (R) A catalyst participating in the reaction froms different activated complex and lowers down the activation energy but the difference in energy of reactant and product remains the same.

Options

A. Both assertion and reason are correct and the reason in correct explanation of assertion.
B. Both assertaion and reason are correct, but the reason does not explain essertion
C. Assertion is correct but reason is incorrect
D. Both assertion and reason are incrrect.

Answer

A

Explanation

Assertion ard reason both are correct and reason is the correct explanation of assertion.
Enthalpy of reactior ie., difference of total enthalpy of reactants and product remains constant in the presence of a catalyst. As a catalyst participating in the reaction forms different activated complex and lowers down the activation erergy but the difference in energy of reactant and product remains same.