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JAMB Chemistry 2011 Question 34

Question 34

Halogens

The bleaching action of chlorine gas is effective due to the presence of

  1. A.hydrogen chloride
  2. B.water
  3. C.air
  4. D.oxygen
Show the answer and explanation

Answer: B (water)

Explanation

Chlorine bleaches only when moist: with water it forms HOCl, which releases oxygen that oxidises the dye.