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JAMB Chemistry 1988 Question 36

Question 36

Halogens

Chlorine is produced commercially by

  1. A.electrolysis of dilute hydrochloric acid
  2. B.electrolysis of brine
  3. C.neutralization of hydrogen chloride
  4. D.heating potassium trioxochlorate (V).
Show the answer and explanation

Answer: B (electrolysis of brine)

Explanation

Industrially, chlorine is made by electrolysing brine (concentrated sodium chloride solution), which also gives sodium hydroxide and hydrogen.