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JAMB Chemistry 1987 Question 50

Question 50

Alkanoic Acids and Esters

The structure of benzoic acid is

Diagram for this question
  1. A.Benzene ring with –CHO (structure A in the figure)
  2. B.Cyclohexane ring with –COOH (structure B in the figure)
  3. C.Benzene ring with –CH2–COOH (structure C in the figure)
  4. D.Benzene ring with –COOH (structure D in the figure)
Show the answer and explanation

Answer: D (Benzene ring with –COOH (structure D in the figure))

Explanation

Benzoic acid is C6H5COOH: a carboxyl group joined directly to a benzene ring. A is benzaldehyde, B has no benzene ring and C is phenylethanoic acid.