Question

A catalyst is a substance that :

• A. helps in attaining equilibrium faster (if any)
• B. increases the rate of forward and backward reaction (if any)
• C. lowers the threshold energy level
• D. provides new pathway to reaction

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A helps in attaining equilibrium faster (if any)
B increases the rate of forward and backward reaction (if any)
C lowers the threshold energy level
D provides new pathway to reaction

A Catalyst is a substance which accelerates the rate of a chemical reaction without undergoing any change in its chemical composition or mass during the reaction.

A catalyst accelerates the rate of a reaction by lowering the activation energy.

Catalyst provides alternate pathway for reaction. Also, it increases the rate of backward and forward reaction to same extent. (as shown)

Due to this lower activation energy, equilibrium attains faster.