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JAMB Chemistry 2003 Question 34

Question 34

Sulphur and its Compounds

Which of the following statements is true of sulphur (IV) oxide?

  1. A.It forms tetraoxosulphate (VI) acid with water
  2. B.It is an odourless gas
  3. C.It is an acid anhydride
  4. D.It forms white precipitate with acidified barium chloride.
Show the answer and explanation

Answer: C (It is an acid anhydride)

Explanation

SO2 dissolves in water to form trioxosulphate (IV) acid, so it is an acid anhydride. It has a choking smell and gives no precipitate with acidified BaCl2.