Filtration Technique


 
 
Concept Explanation
 

Filtration Technique

The process of separating insoluble substances from a liquid, using a filter , generally a filter paper is called filtration. The liquid is allowed to pass through a filter paper. A circular filter paper is folded into a semicircle and then into a quarter-circle. This gives a conical shape to the filter paper. The filter paper is then fitted into a conical funnel. The mixture is poured into the funnel slowly by the side of a glass rod. The liquid passes through the fine pores of the filter paper and is collected in a beaker, while the solid particles are blocked and collected on the filter paper. The filtered liquid is called filtrate and the solid particles collected on the filter paper are called residue. From a mixture of sand and water, sand can be separated by this method. The liquid so collected is called the "Filtrate". The insoluble solid left behind at the filter paper is called "Residue".  The method of filtration is based on the difference in size of particles.

Tea strainer has a wire mesh in it that acts as a filter. The liquid tea passes through the small holes and used tea leaves are left in the tea strainer. The particles of mud are too small and can pass through the holes along with water. For this, we need a fine filter such as filter paper. A filter paper is a piece of special paper that has millions of tiny holes in it. 

Uses of filtration at homes:

  • Fruits and vegetables: Juices are usually filtered to separate seeds and pulp. 
  • For making paneer, lemon is added to the boiling milk. It forms a mixture that consists of particles of solid paneer and a liquid. The paneer is then separated from the liquid through a fine filtering cloth or a strainer.
  • Sample Questions
    (More Questions for each concept available in Login)
    Question : 1

    From a mixture of sand and water, the constituents can be separated by ____________________

    Right Option : A
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    Question : 2

    Filter paper is folded in which shape for the process of filtration?

    Right Option : C
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    Question : 3

    Separation of sawdust from water can be carried out by the following steps given below. Arrange them in a proper sequence.

    • A: The mixture is poured gently into the filter cone and collected in another beaker which is called filtrate.
    • B:  A mixture of sawdust and water is taken in a beaker.
    • C: A filter paper is folded in the form of a cone and fitted into a funnel by moistening it which a few drops of water.
    • D: The solid retained on the filter paper is called residue.
    Right Option : D
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    Explanation
     
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