Question

The method for separation of substance shown in the given image is known as:

(A) Sieving.
(B) Hand-picking.
(C) Threshing.
(D) Winnowing.

Answer 1

Hint: We know that all substances are not present in their pure form in nature. Most of the substances are present in the form of mixtures. We can separate useful components of the mixtures by using various methods of separation.

Complete answer:
Handpicking is an ancient method of separation and we frequently use it in our daily life. As its very simple method of separation. If we give you a bucket full of mangoes and apples and ask you to separate them. In this way you are actually using a hand picking separation method. Thus, we can define handpicking as the separation method in which components of a mixture can be separated by just picking them out by hands is called handpicking. The separation technique which you are using here is handpicking.
Many heterogeneous mixtures in which the size of particles is large enough are separated by simply using a hand picking separation method. While some heterogeneous mixtures you can’t separate by this method such as sand and salt. To separate sand and salt, we dissolve the mixture in water and then filter it. In this way salt gets dissolved in water while sand we get as residue. Thus, we can say handpicking is used for separating slightly larger sized impurities such as pieces of dirt, stones, husk from wheat, rice, pulses etc. it can be used for those mixtures as well which differ in color shape or weight as well.
Therefore, correct answer is option B.

Note:
Remember that it is a very simple and easy method of separation. It doesn’t require any kind of equipment to proceed. It takes very less time when performed for a small quantity of mixture. It doesn’t require any kind of preparation.