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JAMB Chemistry 1978 Question 29

Question 29

Halogens

Hypochlorous acid is used as a bleach because

  1. A.it is a strong acid
  2. B.it yields chlorine readily in pure water
  3. C.it is an oxidising agent
  4. D.it is a weak acid
  5. E.it is a reducing agent
Show the answer and explanation

Answer: C (it is an oxidising agent)

Explanation

HOCl gives up oxygen readily and oxidises coloured dyes to colourless products, so it bleaches by oxidation.