1.

Which of the following pairs of ions are isoelectronic and isostructural?

Answer»

`CO_(3)^(2-),NO_(3)^(-)`
`CIO_(3)^(-),CO_(3)^(2-)`
`SO_(3)^(2-),NO_(3)^(-)`
`ClO_(3)^(-),SO_(3)^(2-)`

SOLUTION :NO. of electrons in `CO_(3)^(2-) = 6 + 3 xx 8 + 2 = 32, "" ` No. of electrons in `NO_(3)^(-) = 7 + 3 xx 8 + 1 = 32`
Thus `CO_(3)^(2-)` and `NO_(3)^(-)` are ISOELECTRONIC.
Further both `CO_(3)^(2-)` and `NO_(3)^(-)` are planar since C as well N atoms are `sp^2` hybridized


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