Question

A substance that enters into a chemical reaction is called a(n) _____.

a. enzyme
b. reactant
c. catalyst
d. product

Answer 1

A substance that enters into a chemical reaction is called a reactant.

Answer 2

Option B

Step-by-step 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.