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JAMB Chemistry 1999 Question 50

Question 50

Hydrocarbons

Which of the compounds above would react to take up two molecules of bromine during bromination?

Diagram for this question
  1. A.I only
  2. B.III only
  3. C.I and II only
  4. D.II and III only
Show the answer and explanation

Answer: B (III only)

Explanation

A triple bond can add two molecules of bromine. Only III (HC≡C–CHO) has a C≡C bond. I has at most one C=C bond (one Br2) and II (ethanedioic acid) has no carbon–carbon multiple bond.