Question

what happens in a chemical reaction

Answer 1

reactants combine and undergo few changes in their composition and form products....

this is known as chemical reaction

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Answer 2

What happens in a chemical reaction
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Chemical reaction is a process which is brought out chemically and bring many changes after completing process.

Or reactant follow a process to form a Product chemically is called chemical reaction.

The changes which can be happen in a chemical reaction are.

1) Colours can be changed of the substances.

2) Temperature can be changed of the substance.

3) Mole fraction can be changed.

4) Solubility of that material can be affected.

5) Concentration of material can be changed.

6) Enthalpy of the material is can be changed.
etc.