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Question

Differentiate between physical change and chemical change.


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Solution

Sr No.CharacteristicsPhysical ChangeChemical Change
1. New substanceNew substance is not formed.New substance is formed.
2. NatureTemporary change.Permanent change.
3. Heat energy

It absorbs or gives out very little heat

energy.

It absorbs or gives out lot of heat

energy.

4. Mass

Mass of the substance does not

change.

Mass of the substance changes.
5. ReversibilityIt is easily reversible.It is irreversible.
6.Examples
  • Mixing sand and water,Breaking a glass.
  • Cooking an egg, Photosynthesis.

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