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JAMB Chemistry 2013 Paper

Question : 23

Total: 44

Solution:

Concept:

Dissolved sulphur(IV) oxide forms an acidic reducing species in water.

Explanation:

Sulphur(IV) oxide,

\mathrm{SO}_2

, dissolves in water to form sulphurous acid,

\mathrm{H}_2\mathrm{SO}_3

This acidic species is a trioxosulphate(IV) compound.

It is readily oxidised further, which makes

\mathrm{SO}_2

act as a strong reducing agent in aqueous solution.

Answer:

D. trioxosulphate (IV) salt

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