A substance that enters into a chemical reaction is called a reactant.
Answer:
Option B
Explanation:
A reactant is a substance that take act as raw material for any chemical reaction.
Catalyst is a substance that helps in either increasing or decreasing the rate of any chemical reaction without themselves physically taking part in any chemical reaction.
Enzyme is also a catalyst . It is in general a bio catalyst.
The final substance produced in any chemical reaction is known as product.
For example -
Sugar(maltose) is converted into glucose in the presence of maltase enzyme
Here – sugar (maltose) is reactant
Glucose is product
And maltase enzyme is catalyst.
