Question

Which of the following pairs of ions are isoelectronic and isostructural?
A. `NO_(3)^(-),CO_(3)^(2-)`
B. `SO_(3),NO_(3)^(-)`
C. `CIO_(3)^(-),CO_(3)^(2-)`
D. `CO_(3)^(2-),CIO_(3)^(-)`

Answer 1

(a) For `NO_(3)^(-)` ion, number of electrons `=7+3xx8+1=32`
`H=(V+M-C+A)/(2)=(5+1)(2)=3`
`implies "Hybridisation"=sp^(2)`
For `CO_(3)^(2)` ion, number of electrons `=6+3xx8+2=32`
`H=(4+2)/(2)=3`
`implies "Hybridisation"=sp^(2)`
`:.` Both `NO_(3)^(2-)` and `CO_(3)^(2-)` are isoelectronic and isostructural species.