Question

difference between physical and chemical changes.

Answer 1

Answer:

In a chemical reaction,there is a change in the composition of the substance in question:

In a physical change the are difference in the appearance,smell,or simple display of a sample matter without a change in a compose.Althought we call them "physical reaction"no action is actually occurring.

Answer 2

Answer:

Difference between physical and chemical change :-

Physical change :-

1. The composition of a substance doesn't changes during a physical change.
2. No new substance is formed .
3. During a physical change only the Physical properties of substance changes .
4. No loss or gain of energy occurs

Chemical change :-

1. The composition of a substance changes during a chemical change .
2. Two or more new substances are formed during a chemical change .
3. There is a loss or gain of energy during a chemical change.
4. The chemical composition changes during a chemical change.