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JAMB Chemistry 2010 Question 46

Question 46

Introduction to Organic Chemistry

The correct order of increasing boiling points of the following compounds C3H7OH, C7H16 and C4H10 is

  1. A.C3H7OH → C4H10 → C7H16
  2. B.C4H10 → C7H16 → C3H7OH
  3. C.C7H16 → C3H7OH → C4H10
  4. D.C4H10 → C3H7OH → C7H16
Show the answer and explanation

Answer: D (C4H10 → C3H7OH → C7H16)

Explanation

Butane is a gas (about 0 °C). Propanol boils near 97 °C because of hydrogen bonding, and heptane, a much larger molecule, boils at about 98 °C.