Question

State four difference between physical and chemical changes

Answer 1

Answer: Physical changes can be reversed, such as burning paper, tie-dying a t-shirt, sharpening a pencil, or ripping a sticky note. Chemical changes can NOT be reversed, such as burning paper, cooking an egg, baking a cake, or iron rusting.

Answer 2

Answer:

Four differences between physical and chemical changes:-

• Temporary/Permanent:- Usually, physical changes are temporary but, in case of chemical change, it is a permanent change.
• Reversible/Irreversible:- Physical changes can be reversed but chemical changes can't be reversed.
• Change in properties:- All properties of an object changes after chemical change but, in case of physical a few property is changed. (Take an example of ice.)
• Formation of new substance:- In case of physical change no new substance is formed (It can be changed into the desired form also) but not so in chemical change.

Know More:-

Examples of Physical changes:-

1. Stretching a rubber band.
2. Crushing a Coca-Cola can.
3. Evaporation of Water.
4. Pressing a football.

Examples of Chemical changes:-

1. Burning of paper.
2. Growth of trees.
3. Cooking raw vegetables.
4. Burning a tree.

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