Which method is used to separate the mixture of chloroform and aniline? (Boiling point of chloroform is 334 K and the boiling point of aniline is 457 K)

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Evaporation

Crystallization

Fractional distillation

Distillation

answer is C.

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Detailed Solution

Since chloroform and aniline are mixtures of miscible liquids, evaporation, and crystallization cannot be used. Both Evaporation and Crystallisation are used to separate the solid-liquid mixtures.
The difference in the boiling point of both liquids is more than 25K so fractional distillation is not used.
So in order to separate the mixture of chloroform and aniline the best method is distillation.
Chloroform will vaporize first and then condense to form the liquid again in the flask. Aniline will remain in the distillation flask.