Question

l What type of mixtures are separated by the technique of crystallisation?

Answer 1

Crystallization technique is used to separate the impurities from a solid to get pure pure crystals of that solid.

Answer 2

Crystallisation is used to purify solids in the form of crystals. 
For example, salt solution ( salt from sea water may have impurities in it ) to remove this impurities and make the salt pure the method Crystallisation is used. Even sugar solution is purified by the process or method Crystallisation.

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