A good method to separate alum from impure samples is:

Filtration

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Sedimentation

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Crystallization

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Sublimation

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Solution

The correct option is C
Crystallization

To prepare pure crystals of potash alum, dissolve the sample in distilled water and remove the insoluble impurities by filtration. This solution is concentrated and cooled. Colourless transparent crystals of potash alum separate. The soluble impurities are left behind in the solution.

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Similar questions

A good method to separate alum (phitkari) from impure samples is:

Column I	Column II
(a) Miscible liquids	(p) Distillation
(b) Immiscible liquids	(q) Crystallization
(c) Pure copper sulfate from an impure sample	(r) Sublimation
(d) Salt and ammonium chloride	(s) Separating funnel

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