Question

The cyanide ion $C{N}^{-}$and the nitrogen molecule $N_2$ are isoelectronic. However, in contrast to $C{N}^{-},N_2$ is chemically inert due to:

• A. unsymmetrical electron distribution
• B. low bond energy
• C. absence of bond polarity
• D. presence of greater number of electrons in bonding

Answer 1

The correct option is C absence of bond polarity

The cyanide ion is polar since $C$ and $N$ have different polarity. However, in nitrogen, both the atoms are same which makes it non polar and hence non reactive.