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in Structure of Matter and Molecule by (51.1k points)
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Why is crystallisation considered a better technique than evaporation?

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Crystallisation is considered a better technique than evaporation because: 

(i) The impurities which remain dissolved in the solution even after evaporation, are removed during crystallisation. 

(ii) Some solids decompose while some, like sugar, get charred when all the liquid evaporates which does not happen during crystallisation.

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