The number of lone pairs of electrons on the central atoms of `H_(2)O,SnCl_(2),PC l_(3) and XeF_(2)` respectively are-

Options

A. 2,1,1,3
B. 2,2,1,3
C. 3,1,1,2
D. 2,1,2,3

Answer

A

Explanation

Number of lone pairs of electrons present in the hybrid orbital, L=H-X-D [where H: no. of orbitals involved in the hybridisation, X: no. of monovalent atoms surrounding the central atom, D: no. of bivalent atoms attached to the central atom]
`H_(2)underset(..)overset(..)(O)` (O is in gr-16,`sp^(3)` hybridised): `L=(4-2-0)=2`
`overset(..)(S)nCl_(2)` (Sn is in gr-14, `sp^(2)` hybridised): L=3-2-0=1
`overset(..)(P)Cl_(3)` (P is in gr-15, `sp^(3)` hybridised), `L=4(4-3-0)=1`
`: underset(..)overset(..)(X)eF_(2)` (Xe is in gr-18, `sp^(3)d` hybridised), `L=5-2-0=3`