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Sublimation

Naphthalene c...

Question

Naphthalene can be separated from sand :
(a) by sublimation
(b) by distillation
(c) by crystallisation
(d) by using water as solvent

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Solution

(a) by sublimation

Naphthalene sublimes on heating, whereas sand does not. So, when the mixture is heated, solid naphthalene turns into vapours, which can be condensed. Sand remains in the container.

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