Handpicking: A Separation Technique, Advantages, Disadvantages (For CBSE, ICSE, IAS, NET, NRA 2022)

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Handpicking

  • Method of separation by hand is known as handpicking. But some of them cannot be removed by hand and we need some other methods of separation for such mixtures.
  • For example: In our house, our mother separates stones and insects from rice simply by hand. But in case of tea and tea leaves, the method of handpicking is not sufficient for the separation and a filter is required. Thus, we can say that there are different methods to separate different mixtures depending upon the constituents of the mixture and the final product required. Some of these methods are carried out in dry conditions while some of them are carried in wet conditions.
  • The method in which substances in a mixture can be separated by just picking them out with the help of hand from the mixture is known as handpicking method. It is one of the various methods which are carried out in dry conditions. The substances which are separated with the help of this method can be useful product or the impurities which need to be removed or both the substances which are separated can be useful products. This method is useful only when the substance which needs to be separated is in small quantity.
  • The substances in the handpicking method can be separated on the basis of size, color, shape, weight etc. Handpicking examples are: If in a bowl, there are 7 round shaped boxes and 3 rectangular boxes then the boxes can be easily separated on the basis of shape.
  • Most methods have their advantages and limitations. The advantages of handpicking and its disadvantages have been mentioned below:

Advantages

  • This method doesnีšt need any special machinery for the separation of substances.
  • It takes less time when used for a small quantity.

Disadvantages

  • It is not feasible for large quantity of substances.
  • It is only possible when substances are visibly different in size.

Questions

What is Handpicking in Chemistry?

Answer:

  • Some substances are easily separable just by taking out the impurities with hand. This method of separation is known as hand-picking.
  • The method in which substances in a mixture can be separated by just picking them out with the help of hand from the mixture is known as hand-picking method.

What is Handpicking in Separating?

Answer:

The method in which substances in a mixture can be separated by just picking them out with the help of hand from the mixture is known as handpicking method.

What is Example of Handpicking?

Answer:

The process used to separate slightly larger particles from a mixture by hand is called handpicking. For example: Stone pieces can be separated from wheat or rice by handpicking.

How is Hand Picking Technique Done?

Answer:

  • Handpicking is a separation technique used to remove the unwanted impurities from the mixture by hand.
  • It involves simply picking out substances by hand and separating them form others. Handpicking method can be used when items differ on the basis of color, shape and weight.

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