Question

2. A substance which alters the rate of a chemical reaction is called a​

Answer 1

Answer:

Catalyst

Explanation:

A catalyst is a substance that alters the rate of a chemical reaction but it remains chemically unchanged afterwards. The catalyst increases the rate of the reaction by providing a new reaction mechanism to occur with in a lower activation energy.

Answer 2

Answer:

catalyst is a substance which alters the rate of a chemical reaction.