Question

What is the role of catalyst in catalytic reaction ?

• A. It decreases the enthalpy of reaction.
• B. It increases the enthalpy of reaction.
• C. It decreases the energy of activation of reaction.
• D. It increases the energy of activation of reaction.

Hint:

A catalyst provides an alternate path with lower activation energy.

Answer 1

The Correct Option is C

Step 1: Concept
The energy barrier of a path decides the rate.

Step 2: Catalyst effect
It lowers this barrier but leaves $\Delta H$ unchanged.

Step 3: Pick
Only option (C) matches.

Final Answer:
Option (C). \[ \boxed{\text{Decreases activation energy}} \]