Question

what are catalyst ? why are they important in addition reaction ?

Answer 1

Catalyst are substances that influence the speed of a chemical reaction by altering its speed,without themselves undergoing any permanent chemical change.

Importance of catalyst in addition reaction:

They increase the rate of reaction, are not consumed by the reaction and are only needed in very small amounts.

They act as important medium for

1. Adsorption

2. Intermediate compounds in addition reaction.