Question

What are Chemical changes and Physical changes??
Explain?!​

Answer 1

In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed.

All chemical reactions are reversible although this can be difficult in practice.

Hope this helps.

Answer 2

Answer:

Key Points. Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.