Question

The new substances are formed during or after the physical reaction

Answer 1

A change in which one or more new substances are formed is called a chemical change. A chemical change is also called a chemical reaction.

Answer 2

Answer:

New substances are formed by chemical reaction not physical reaction.

Explanation:

After the reaction only we get new substance.

Physical reaction

Here we can convert them into a substance and also we can again convert it into actual substance

Ex...

Sugar dissolved in water

but if we boil it then the water gets evaporated and sugar remains same.

Chemical reactions

Here we can convert

and it forms new substance

Hope it will helpful for you