State four differences between physical and chemical changes.

Answer»

Physical change	Chemical change
1. No new substances with new properties are formed.	1. New substances with new properties are formed.
2. It can be reversed by simple physical methods.	2. Change cannot be reversed by simple physical methods.
3. It is a temporary change.	3. It is a permanent change.
4. Energy is neither needed nor produced.	4. Energy is either needed or evolved.

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