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JAMB Chemistry 1988 Question 44

Question 44

Hydrocarbons

The acidic hydrogen in the compound H–C≡C–CH=CH–CH3 (carbons numbered 1 to 5 from the left) is the hydrogen attached to carbon number

  1. A.5
  2. B.4
  3. C.3
  4. D.1
Show the answer and explanation

Answer: D (1)

Explanation

A hydrogen on a triple-bonded carbon (≡C–H) is weakly acidic. Only carbon 1 carries such a hydrogen.