Question

what is chemical reaction​

Answer 1

Answer:

the reaction that doesn't change is known as chemical reaction.

Explanation:

which do not come back in original shape, size etc

Answer 2

Answer:

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Explanation:

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.

Or

Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

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