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JAMB Chemistry 2000 Question 44

Question 44

Hydrocarbons

Unsaturated organic compounds are identified by decolourization of

  1. A.silver bromine and potassium tetraoxomanganate (VII) solutions
  2. B.bromine water and acidified potassium tetraoxomanganate (VII) solution
  3. C.silver bromide solution and bromine water
  4. D.bromine water and alkaline potassium tetraoxomanganate (VII) solution.
Show the answer and explanation

Answer: B (bromine water and acidified potassium tetraoxomanganate (VII) solution)

Explanation

A C=C or C≡C bond decolourises reddish-brown bromine water and purple acidified potassium tetraoxomanganate (VII) solution.