Question

4. When is sieving used as a method of separation​

Answer 1

Answer:

We use certain separation techniques in order to separate the flour from the impurities attached to it. We generally use sieve plates for the separation of flour from the bran particles or other impurities. ... For example, sieving is also used for separation of husk and stone from wheat.

Answer 2

Answer:

Sieving is used when components of a mixture have different sizes. Sometimes, it may not be possible to separate components of a mixture by winnowing and handpicking. For example, there may be lighter impurities like dust or soil particles in rice or pulses.

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