Question

The oxyacid of sulphur that contains a lone pair of electrons on sulphur is:

• A. sulphurous acid
• B. sulphuric acid
• C. peroxodisulphuric acid
• D. pyrosulphuric acid

Answer 1

Answer: (A)

sulphurous acid

The oxyacid of sulphur that contains a lone pair of electrons on sulfur is sulfurous acid $H_{2}S{O}_3$ in wich only 4 of ts valence electrons are involved in bonding remaining 2 electrons are remained as a lone pair sulfur(Sulr has six valence electrons).

Hence option A is correct.