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Question 6.

Write any two differences between a chemical change and a physical change.


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Solution


The difference between a physical change and a chemical change

Physical change -

i. In a physical change, only the physical properties of a substance get changed and no new substance is formed.

ii. Physical changes are generally reversible.

Example - Melting of wax

Chemical change -

i.In a chemical change a new substance is formed whose composition and chemical properties are entirely different from that of the original substance.

ii. Chemical changes are always irreversible.

Example - Rusting of iron


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