Question

Tell about chemical and physical reaction.​

Answer 1

Answer:

The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition

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Answer 2

Answer:

A reaction in which a chemical change is produced is known as a chemical reaction. It usually is followed by the formation of a new substance.

Ex. H2 + O2 = H2O.

A reaction in which a substance changes its physical state is called a physical reaction.

Ex. Burning or paper, melting of ice.

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