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

Options

A. `CO_(3)^(2-),NO_(3)^(-)`
B. `CIO_(3)^(-),CO_(3)^(2-)`
C. `SO_(3)^(2-),NO_(3)^(-)`
D. `ClO_(3)^(-),SO_(3)^(2-)`

Answer

A

Explanation

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