Question

Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.

Catalyst

Answer 1

Catalyst:

It is a substance which alters the rate of the reaction [i.e. increases or decreases the rate] without taking part in the reaction.It itself remains chemically unchanged at the end of the reaction.

Example: Catalytic oxidation of ammonia – using catalyst platinum

\[\ce{4NH3 + 5O2 ->[Pt][800°C] 4NO + 6H2O + \triangle}\]