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JAMB Chemistry 2002 Question 31

Question 31

Hydrocarbons

The reaction of an alkene with hydrogen in the presence of a catalyst is

  1. A.a substitution reaction
  2. B.an oxidation reaction
  3. C.a nucleophilic reaction
  4. D.an addition reaction.
Show the answer and explanation

Answer: D (an addition reaction.)

Explanation

Hydrogen adds across the C=C double bond to give an alkane, so it is an addition reaction (hydrogenation).