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JAMB Chemistry 1997 Question 29

Question 29

Halogens

Oxidation of concentrated hydrochloric acid with manganese (IV) oxide liberates a gas used in the

  1. A.manufacture of tooth pastes
  2. B.treatment of simple goitre
  3. C.vulcanization of rubber
  4. D.sterilization of water
Show the answer and explanation

Answer: D (sterilization of water)

Explanation

MnO2 oxidizes HCl to chlorine gas. Chlorine kills germs, so it is used to sterilize drinking water.