Question

define chemical reaction ?​

Answer 1

Answer:

A process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction.

Explanation:

hope its help you...

Answer 2

Answer:

that cannot be changes.

Explanation:

a chemical reaction is a reaction that cannot be reversed or cannod be changed . this reaction is also called irreversible reaction

example:

baking of chappati cooking of food