Which of the following are isoelectroni...

Which of the following are isoelectronic and isostructural ?
`NO_(3)^(-) , CO_(3)^(2-),ClO_(3)^(-),SO_(3)`

A

`NO_(3)^(-), CO_(3)^(2-)`

B

`SO_(3), NO_(3)^(-)`

C

`ClO_(3)^(-), CO_(3)^(2-)`

D

`CO_(3)^(2-), SO_(3)`

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The correct Answer is:

A

`NO_(3)^(-) and CO_(3)^(2-)` both have 32 electrons, central atom `sp^(2)` hybridized, triangular planar.

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