Question

two differences between the following: (4)

i) Physical change and chemical change.​

Answer 1

Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.

Answer 2

Answer:

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Difference between Physical And Chemical Change.

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Physical Change

1. The properties of the original substances remain the same in the physical change.

2. Their original composition remains unchanged.

3. The physical changes are reversible. e.g. - Evaporation, boiling, dissolution, etc.

Chemical Change

1. The properties of the original substance alter in chemical change.

2. Their original composition changes.

3. The chemical changes are irreversible.

e.g. - Photosynthesis, corrosion.

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