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Q.

Is it true that threshing, winnowing, hand picking and sieving are the methods to separate unwanted solid particles from a mixture of solids?


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a

True

b

False  

answer is A.

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Detailed Solution

The above statement is true.
Winnowing is separating or removing the husk, chaff, and hay from the grains with the help of wind or by blowing air. Threshing is the separation of grains or seeds from the stalks that are dried in the sun. Sieving is the process of separating a mixture of fine particles and large particles using a sieve. The larger-sized impurities which are visible, like stones, insects, etc., are removed by hand picking from a mixture. All these methods can be used to separate unwanted solid particles from a mixture.
 
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