• # question_answer 62) The cyanide ion, $C{{N}^{-}}$ and ${{N}_{2}}$ are isoelectronic. But in contrast to $C{{N}^{-}},{{N}_{2}}$ is chemically inert, because of A)  low bond energyB)  absence of bond polarityC)  unsymmetrical electron distributionD)  presence of more number of electrons in bonding orbitals

Solution :

Both $CN$ and ${{N}_{2}}$ molecules have the same $MO$ diagrams but differ only in bond polarity. Thus ${{N}_{2}}$. is inert due to absence of bond polarity while CN ion is reactive due to presence of bond polarity.

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