Question

List two ways in which crystallisation technique is better than simple evaporation technique

Answer 1

Explanation:

Crystallisation technique is better than simple evaporation because:

1. Some solids decompose or get charred ( Eg.Sugar) on heating to dryness during evaporation. There is no such problem in crystallization.

2. Some impurities may remain dissolved in the solution even after filtration which may contaminate the solid on evaporation. But such impurities get removed in crystallization.

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Answer 2

Answer:

Crystallization is the better method of separating the mixture than evaporation .This is because ,on evaporation some of the soild particles in mixture get decomposed leaving behind impurities whereas in crystallization ,pure crystals of soilds are obtained.

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