Question

The use of catalyst in chemical reaction _______ activation energy of reaction.
1. increases
2. decreases
3. maintains
4. none

Answer 1

Berzelius used the word catalyst first time in 1835 for some substances which alters the rate of chemical reaction and themselves remain chemically and quantitatively unchanged after the reaction and the phenomenon is known as catalysis.

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.