Question

Suggest method used for separating

1. Husk from wheat
2. Sand from water
3. Stones from pulses
4. Camphor powder from common salt powder l.
5. Butter from milk

Answer 1

1)Winnowing
2) Filtration
3)Handpicking
4) Sublimation
5) Centrifugation
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Answer 2

The methods to separate the substances given are:

• Husk from wheat - Winnowing,
• Sand from water - Filtration,
• Stones from pulses - Handpicking,
• Camphor powder from common salt powder - Sublimation, and
• Butter from milk - Centrifugation respectively.

Explanation:

• Winnowing is a primary purpose of separating grain from chaff.

• The mixture is thrown in the air so that the current carries away the lighter, unwanted particles and leaves the heavier grain intact.

• Filtration is a process for separating something which is solid from a mixture which is primarily liquid in nature.

• It is passed through a substance which blocks the solid stuff and lets the liquid pass easily.

• Stones from pulses can be separated by handpicking. This is a relatively tedious task as a person has to sort these stones out by their hands.

• They are bigger than the pulses and non-uniform in shape.

• Sublimation refers to solids directly turning into vapours without undergoing liquidation or vice versa.

• Salt has a tendency to undergo this process which helps separate camphor powder from it.

• Centrifugation is a process of separation which involves spinning.

• The mixture is treated with continuous spinning which allows substances like butter to be separated from milk.

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