Which of the following species exhibits the diamagnetic behaviour?

Options

A. `O_(2)`
B. `O_(2)^(o+)`
C. `NO`
D. `O_(2)^(2-)`

Answer

A, B, C

Explanation

The compound/species having odd `e^(-')s` is paramagnetic since they contain unpaired `e^(-')s` except `O_(2)`
(a) `O_(2) = 16 e^(-')s` (b) `O_(2)^(o+) = 16 - 1 = 15 e^(-')s`
(c ) `NO = 7 + 8 = 15 e^(-')s` (d) `O_(2)^(2-) = 16 + 2 = 18 e ^(-')s`
Hence `O_(2)^(o+)` and `NO` are paramagnetic `[O_(2)` is also paramagnetic `(MOT)`] .