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JAMB Chemistry 1980 Question 36

Question 36

Halogens

When chlorine gas is passed into a solution of sulphur dioxide

  1. A.sulphur dioxide is reduced to sulphur
  2. B.the chlorine is oxidized to hydrochloric acid
  3. C.dilute sulphuric acid and hydrochloric acid are produced
  4. D.hydrochloric acid and sulphur are produced
  5. E.sulphur trioxide is the only product
Show the answer and explanation

Answer: C (dilute sulphuric acid and hydrochloric acid are produced)

Explanation

SO2 + Cl2 + 2H2O → H2SO4 + 2HCl: chlorine oxidises the sulphur dioxide to sulphuric acid and is itself reduced to HCl.