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  4. Absolute alcohol is prepared by

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Q. Absolute alcohol is prepared by

MGIMS WardhaMGIMS Wardha 2011

Solution:

Absolute alcohol is 100% pure ethanol. The fractional distillation of aqueous solution of ethanol gives a constant boiling azeotropic mixture which contains 95% ethanol. To get 100% ethanol, a small amount of benzene is added with azeotropic mixture and then distilled. It is called azeotropic distillation.