Question

what is reaction???​

Answer 1

$\huge \underline\box \mathbb \red {ANSWER}$

a chemical process in which substances act mutually on each other and are changed into different substances, or one substance changes into other substances.

Answer 2

A reaction or chemical reaction is a chemical change which forms new substances. In other words, reactants react to form products that have a different chemical formula. Indications a reaction has occurred include temperature change, color change, bubble formation, and/or precipitate formation.