Which of the following does not contain isoellectonic speices ?

Options

A. ` PO_4^(3-) , SO_4^(2-) ,ClO_4^-`
B. `CN^- , N_2, C_2^(2-)`
C. `SO_3^(2-) ,CO_3^(2-), NO_3^-`
D. `BO_3^(3-) , Co_3^(2-), NO_3^(-)`

Answer

C

Explanation

`SO_3^(2-)` has ` 42` electron ` CO_3^(2-)` has `32` electrons .
` NO_(3)^(-)` has `32` electrons .