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JAMB Chemistry 2007 Question 42

Question 42

Hydrocarbons

Which of the following alkanes has the highest boiling point?

  1. A.Pentane.
  2. B.Ethane.
  3. C.Propane.
  4. D.Methane.
Show the answer and explanation

Answer: A (Pentane.)

Explanation

Boiling point rises with molecular size because van der Waals forces get stronger; pentane is the largest of the four.