Question

what is mean by chemical reaction ​

Answer 1

Answer:

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.

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Answer 2

A chemical reaction is 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

A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another.