Question

2. Write any two points of difference between physical and chemical change.​

Answer 1

Answer:

Differences Between Physical and Chemical Change

Physical Change Chemical Change

When a substance undergoes a physical change, its composition remains the same despite its molecules being rearranged. When a substance undergoes a chemical change, its molecular composition is changed entirely. Thus, chemical changes involve the formation of new substances.

Physical change is a temporary change. A chemical change is a permanent change.

A Physical change affects only physical properties i.e. shape, size, etc. Chemical change both physical and chemical properties of the substance including its composition

Answer 2

Answer:

A physical change involves very little to no absorption of energy . During a chemical reaction, absorption and evolution of energy take place

Chemical change are irreversible