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Extractive distillation of ethanol and water is done using?

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Extractive distillation of ethanol and water is done using?

(a) Benzene

(b) Ethylene glycol

(c) Alcohol

(d) Any acid

I have been asked this question in an international level competition.

I'd like to ask this question from Extractive Distillation Terminology in division Azeotropic and Extractive Distillation of Distillation Design

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Right choice is (b) Ethylene glycol

For explanation I would say: Extractive distillation of ethanol and water using ethylene glycol as an entrainer is a classic example in the distillation literature.

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