Question

Why is crystillation is better than evaporation for separation of mixtures

Answer 1

Crystallisation is a process that separates a pure solid in the form of its crystals from a solution.
Crystallisation is better than evaporation because during Evaporation
Some solids decompose or some, like sugar may get charred on heating to dryness.
Some impurities may remain dissolved in the solution even after filtration which on evaporation contaminates the solid.

Answer 2

Why crystalization is better than evaporation?

1. It occurs on the entire surface.
2. we get solid in the pure crystallized form.
3. The soluble impurities get removed in this process.
4. It doesn't require very high temperature conditions.