Class 11 NEET Chemistry Chemical Bonding And Molecular Structure Part 1

In sulphite ion, the central atom sulphur is sp3 hybridised. Electronic structure of S atom in excited stateThe three p electrons form σ bonds with three oxygen atoms - with one position (of the tetrahedron) being occupied by a lone pair. The d electron (excluded from hybridisation) forms π bond with one oxygen atom. i.e. pπ−dπ bonding occurs.