QJEEM20Cha256: JEE Main 2020 Chemistry - Class 11 JEEM20Cha256 Solution: The bond order and the magnetic characteristics of CN - are :

Question

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The bond order and the magnetic characteristics of CN^- are :

Accepted Answer

CN^- has 14 electrons.

Moleculer orbital configuration of CN^- is

{\sigma _{1{s^2}}}\,\sigma _{1{s^2}}^ * \,\,{\sigma _{2{s^2}}}\,\,\sigma _{2{s^2}}^ * \,\,{\pi _{2p_x^2}} =\,{\pi _{2p_y^2}}\,{\sigma _{2p_z^2}}

Here is no unpaired electron so it is diamagnetic.
N_b = 10

N_a = 4

\therefore\,\,\,\,

BO =

{1 \over 2}\left[ {10 - 4} \right]

= 3

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