Find the number of molecule having two lone pair electrons on central atom ${\mathrm{I}}_3^{+},{ \mathrm{XeF}}_2,{ \mathrm{XeF}}_4, {\mathrm{H}}_2\mathrm{O},{ \mathrm{NH}}_2^{-}, {\mathrm{H}}_2\mathrm{S}, {\mathrm{H}}_2{\mathrm{SO}}_4,{ \mathrm{NF}}_3$

The molecule having two lone pair electrons on central atom is  ${\mathrm{I}}_3^{+},{ \mathrm{XeF}}_4, {\mathrm{H}}_2\mathrm{O},{ \mathrm{NH}}_2^{-}, {\mathrm{H}}_2\mathrm{S}$ 

${{\mathrm{I}}_3}^{-}$ has a linear Molecular Geometry. While there are three Iodine atoms, one of them has a negative charge, resulting in two bond pairs and three lone pairs of electrons. It will have a steric number of 5. The three solitary pairs will oppose each other and occupy the equatorial locations.

Hence, the number of molecule having two lone pair electrons on the central atom is 5.