Question

difference between physical and chemical changes​

Answer 1

Answer:

PHYSICAL CHANGES-

*TEMPORARY CHANGES

*NO NEW SUBSTANCE IS FORMED

*MATTER CHANGES FORM BUT CHEMICAL IDENTITY IS NOT CHANGED

*e. g. BOILING,MELTING, FREEZING etc.

CHEMICAL CHANGES-

*PERMANENT CHANGES

*NEW SUBSTANCE IS FORMED

*RESULTS FROM CHEMICAL REACTION

*e. g. BURNING OF PAPER etc.

Answer 2

Answer:

physical and chemical changes :-

physical changes :-

1....Physical change refers to a change in which the molecules are rearranged but their internal composition remains same.

2,.these changes are reversible change

3. for example such as

1.tearing of paper,

2.melting/freezing of water,

3. cutting of trees, etc.

chemical changes :-

1..the changes which bring out the formation of new substance is named as the chemical change.

2.. these changes are irreversible..

3.. for example such as

1. Digestion of food.

2. Burning of a matchstick, fuels.

3. Cooked or riped vegetables, fruits.

4. Getting old.

5. Formation of curd.