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Sieving

The mixture o...

Question

The mixture of stones and clear sand can be separated by the process of ______ .

A

True

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B

False

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C

Decantation

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D

Evaporation

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Solution

The correct option is A
True

Sand occurs in powdered form. So by using a proper mesh, the mixture of stones can be separated from sand by sieving. The sand will pass through and the stones will be held back.

Winnowing cannot be used in the above case as it is a method in which heavier components of the mixture are separated from the lighter substances with the help of wind. But this method does not work for materials heavier than grains like stones.

Decantation and evaporation cannot be used as in both the techniques one component should be a liquid.

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Q. State whether the following statements are true or false.

(a) A mixture of oil and water can be separated by filtration.
(b) Water can be separated from salt by evaporation.
(c) A mixture of wheat grains and wheat flour can be separated by sieving.
(d) A mixture of iron filings and rice flour can be separated by a magnet.
(e) A mixture of wheat grains and rice flakes can be separated by winnowing.
(f) A mixture of tea leaves and milk can be separated by decantation.

Q. True or false?
(a) A mixture of milk and water can be separated by filtration.
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(c) Separation of sugar from tea can be done with filtration.
(d) Grain and husk can be separated with the process of decantation.

Q. Select a suitable word from those given and write it in the space provided:
sieving, winnowing, loading, evaporation, decantation, filtration, condensation, distillation, sedimentation, sublimation
(a) After pounding, rice is separated from its husk by ______________ .
(b) A mixture of stones is allowed to fall through wire nets in order to separate them according to different sizes. This is a process of ______________ .
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Q. A mixture of sand and salt can be separated by winnowing.

Q. The mixture of dry leaves and sand can be separated by the process of sieving.

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