Question

write four difference begween physical and chemical change
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Answer 1

Answer:

Physical change is reversible change . No new substance is formed during the process. e.g. ice to water , melting of wax etc.

Chemical change is irreversible change. A new substance is formed during the process. e.g. digestion of food, burning of paper etc.

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Answer 2

Answer:

Difference between physical change and chemical change

• Physical change

1. A physical change brings about changes in physical properties of the substance. Such as physical state shape and size.
2. There is no change in chemical composition of the substance.
3. No new substance is form in a physical change.
4. Physical changes are temporary.
5. Physical changes are reversible.

• Chemical change

1. A chemical change brings about changes in the chemical properties of the substance.
2. There is always a change in the chemical composition of a substance.
3. A new substance is formed during a chemical change.
4. Chemical changes are permanent.
5. Chemical changes are irreversible.