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Q.

Anthracene is purified by

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a

Filtration

b

Crystallisation

c

Distillation

d

Sublimation

answer is D.

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Detailed Solution

This process is very usefull for seperation of substances which are sublimable on heating from non volatile impurities.

Eg: Benzoic acid, Naphthalene, Anthracene, Camphor, Anthraquinone, Indigo etc.

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Condition: The compound sholud have high vapour pressure below its melting point.

 

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