What is the role of positive catalyst in a chemical reaction?

Question

Question

Answer 1

The correct answer is It increases the rate of reaction.

Key Points

A catalyst is a substance that can be added to a reaction to increase the reaction rate without getting consumed in the process.
Catalysts typically speed up a reaction by reducing the activation energy or changing the reaction mechanism.
Enzymes are proteins that act as catalysts in biochemical reactions.
Common types of catalysts include enzymes, acid-base catalysts, and heterogeneous (or surface) catalysts.
A positive catalyst is a substance that increases the rate of reaction or the speed of the reaction without getting consumed in the process. Hence, Option 1 is correct.
These catalysts can be recovered at the end of the reaction and reused as they do not get altered in any way during the reaction.
Catalysts can be of 2 types:
Homogenous catalysts- those catalysts which are in the same phase or state (mostly liquid or gas) as the reactants.
Heterogeneous catalysts- those catalysts which are in a different phase than the reactants. Catalysts that are involved in biochemical reactions are called enzymes.