1.

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

Answer»

2,1,1,3
2,2,1,3
3,1,1,2
2,1,2,3

Solution :`:H_(2)underset(..)OVERSET(..)(O)` (O is GROUP 16) `overset(..)(S)nCl_(2)` (Sn is group 14),
`overset(..)(P)Cl_(3)` (P is group 15), `:underset(..)overset(..)(X)eF_(2)` (Xe is group 18).


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