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JAMB Chemistry 1999 Question 42

Question 42

Hydrocarbons

The hydrocarbon that burns in air with a sooty flame is

  1. A.C2H6
  2. B.C3H8
  3. C.C4H10
  4. D.C6H6
Show the answer and explanation

Answer: D (C6H6)

Explanation

Benzene has a very high proportion of carbon (C : H = 1 : 1), so it does not burn completely in air and gives a smoky, sooty flame.