Question

Does the physical state if a substance always change during a chemical change ? Give reasons ​

Answer 1

Answer:

A physical change is a change to a sample of matter in which some properties of the material change, but the identity of the matter does not. When we heat the liquid water, it changes to water vapor. But even though the physical properties have changed, the molecules are exactly the same as before.

Answer 2

No not compulsory it may be or not