What is chemical change?

Chemical changes occur when a substance combines with another to form a new substance, it is also called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions.

Characteristic of Chemical Changes are:

1. Change is permanent.

2. New substances are formed with entirely different physical and chemical properties.

3. Change can’t be reversed by simple physical method. Ex- cooking, baking.

4. Energy is released or absorbed during a chemical change.