1.

Which of the following species has tetrahedral geometry ?

Answer»

`BH_(4)^(-)`
`NH_(2)^(-)`
`CO_(3)^(2-)`
`H_(3)O^(+)`

Solution :`BH_(4)^(-)`
`BH_(4)^(-) rArr` 4 bond pairs + O lone pair `rArrsp^(3)`
`rArr` hybridised to tetrahedral geometry
`NII_(2)^(-) ` = V-shape ,`"" CO_(3)^(2-)` = TRIANGULAR PLANAR
`H_(3)O^(+)` = pyramidal


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