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प्रश्न
Explain the term ‘sieving’. State the structure of a sieve and explain the separation of different sized particles by sieving.
उत्तर
Sieving — is a method of separation, which is used for separating substances of different sizes that cannot be separated in handpicking.
Principle — Based on the difference in the size of the solid particles.
The technique of Separation — The large-sized particles are separated from the small or finer particles by passing the mixture through a sieve. The sieve has a wooden frame, with a metal mesh at its base. The mixture is added from the top of the sieve when the larger particles stay above and the finer particles collect below it on shaking the sieve.
Examples — Separation of rice powder from the soil, separation of different sized particles of diamond, and of sand.
संबंधित प्रश्न
Define Crystallisation
State the principle involved in separation of solid-solid mixtures by sieving
Draw a neat labelled diagram for the separation of the following mixture.
Coarse sand from fine sand
State the technique involved in separating the following:
Large diamonds from very small diamonds
Give reasons for the following:
Two varieties of wheat flour cannot be separated by sieving.
What is sieving? Where is it used?
______ is used to separate gravel from the sand at a construction site.
Pure rava, when adultered with wheat flour, is separated by ______.
While preparing chapatis, Paheli found that the flour to be used was mixed with wheat grains. Which out of the following is the most suitable method to separate the grains from the flour?
Husk from wheat flour is generally removed by ______.
