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JAMB Chemistry 1987 Question 45

Question 45

Petroleum and Coal

The most volatile fraction obtained from fractional distillation of crude petroleum contains

  1. A.butane, propane and kerosene
  2. B.butane, propane and petrol
  3. C.ethane, methane and benzene
  4. D.methane, ethane and propane.
Show the answer and explanation

Answer: D (methane, ethane and propane.)

Explanation

The most volatile fraction has the lowest boiling points: the refinery gases, made of the smallest alkanes such as methane, ethane and propane.