Question

Name the two methods of separation of substance
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Answer 1

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Handpicking,

• The method in which substances in a mixture can be separated by just picking them out with the help of hand is known as handpicking method.

Winnowing,

• The process of separating heavier and lighter components of a mixture by wind or by blowing air is called winnowing.

Answer 2

AnsweR:

The other kind of change in chemistry is a physical change, which is when a substance changes without becoming a new chemical. These physical changes are often changes in state such as melting, freezing, boiling, condensing and dissolving.

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