Question

Which of the following statements regarding sulphur dioxide is not true?

• A. $S{O}_2$ is an angular molecule
• B. $S{O}_2$ may be regarded as the resonance hybrid of two canonical structures
• C. $S{O}_2$ is an anhydride of sulphuric acid
• D. $S{O}_2$ is an anhydride of sulphurous acid

Answer 1

The correct option is C $S{O}_2$ is an anhydride of sulphuric acid

Sulphuric acid
$H_{2}S{O}_4\underset{-H_{2}O}{\to }S{O}_3$
Anhydride are formed on removal of water molecule.

The anhydride of sulphuric acid is $S{O}_3$ while the anhydride of $H_{2}S{O}_3$ i.e. sulphurous acid is $S{O}_2$.