Question

The role of a catalyst is to change______________

• A. enthalpy of reaction.
• B. gibbs energy of reaction
• C. activation energy of reaction.
• D. equilibrium constant.

Answer 1

The correct option is C activation energy of reaction.

• The substance which increases the rate of reaction without being consumed in the chemical reaction is called a catalyst.
• The catalysts can lower the activation energy and increase the reaction rate of reaction without being consumed in the reaction.

But a catalyst does not change Gibbs energy, the enthalpy of reaction and equilibrium constant of reaction.

Hence, option (C) is correct.