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Bond order and magnetic nature of CN^- a...

Bond order and magnetic nature of `CN^-` are respectively

A

`2(1)/2,`diamagnetic

B

3 paramagnetic

C

3, diamagnetic

D

`2(1)/2` , paramagnetic

Text Solution

Verified by Experts

The correct Answer is:
C
According to MOT (If z is internuclear axis) The configuration of
`CN^(-):sigma_(1s)^(2),sigma_(1s)^(**2),sigma_(2s)^(2),sigma_(2s)^(**2),pi_(2p_x)^2=pi_(2p_y)^(2),sigma_(2p_z)^(2)`
Bond order = `1/2=(10-4)`
=3
`CN^(-)` is diamagnetic due to absence of unpaired electron.
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