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JAMB Chemistry 1983 Question 34

Question 34

Separation of Mixtures

Which of the following separation processes is most likely to yield high quality ethanol (>95%) from palm wine?

  1. A.Fractional distillation without a dehydrant
  2. B.Simple distillation with a dehydrant
  3. C.Fractional distillation with a dehydrant
  4. D.Column chromatography
  5. E.Evaporation
Show the answer and explanation

Answer: C (Fractional distillation with a dehydrant)

Explanation

Palm wine is mostly water, so fractional distillation is needed to concentrate the ethanol, and it stops at about 95%; a dehydrant (e.g. quicklime) is then needed to remove the remaining water.