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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. Handpicking is one of the methods of separation. It is a very old separation technique. You must have seen your mother separating stones or other impurities from rice by handpicking and washing it before cooking. You generally use different methods of separation in your daily life. Handpicking is the most common one.
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If you want to separate black grapes from the mixture of black and green grapes, then you will simply pick black grapes using your hands from the mixture. In this way you are actually using handpicking 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.
Handpicking is 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. Then which method of separation will you use? Simply you will start picking out one kind of fruit either mango or apple. In this way you will separate one from another. The separation technique which you are using here is handpicking. Many heterogenous mixtures in which size of particles is large enough are separated by simply using handpicking separation method. While some heterogenous 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 get 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.
Following are the examples of handpicking separation method –
For separating the mixture of chillies and lady’s finger. (on the basis of size)
For separating stones from rice, pulses and wheat. (on the basis of size and color)
For separating rotten potatoes from fresh ones. (on the basis of shape, color and smell)
For separating different kinds of vegetables from the mixture of vegetables in the basket. (on the basis of shape, color, size)
For separating the mixture of yellow dal and rice. (on the basis of color)
Following are the advantages of handpicking separation method –
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 small quantity of mixture.
It doesn’t require any kind of preparation.
Following are limitations of handpicking separation method –
We can’t separate all heterogeneous mixtures by handpicking.
It is a very time taking process if quantity of the mixture is large.
This was all about handpicking separation technique. Apart from handpicking many other methods are used to separate mixtures such as threshing, winnowing, sieving, sedimentation, decantation, filtration, evaporation, condensation, sublimation, distillation, magnetic separation etc. If you want to know about other separation techniques in detail, then register yourself on Vedantu or download Vedantu learning app for class 6-10, IITJEE and NEET. By registering on Vedantu website, you can also download free PDFs of correct and precise NCERT Solutions available on Vedantu.