Question

what happens in a chemical change but not in a physical change?

Answer 1

Answer:

In a chemical change - -

New substance forms

Evolution of heat

Evolution of light

Change in colour

Change in nature (i.e. Acidity and basicity)

Answer 2

Chemical Change

In a chemical change composition of matter takes place and these reaction are irreversible while in Physical change only physical properties change and these are reversible.

Some Examples

- Digestion of Food

- Oxidation of Iron { formation of Rust }