Q77 of 252 Page 107

The technique which is used to separate particles of a solid suspended in a liquid quickly is called:

Centrifugation is a method of separating the suspended particles of a substance from a liquid in which the mixture is rotated at a high speed in a centrifuge.

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75

Pure copper sulphate can be obtained form an impure sample by the process of :

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The material which is added to water during purification process at the water works so as to disinfect it is :

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Naphthalene can be separated for sand:

 79

Which of the following cannot be separated from air by the process of fractional distillation?