Consider the following species: ${\text{CN}}^{+},{\text{CN}}^{-},\text{NO}$ and $\text{CN}$. Which one of these will have the highest bond order?

Using Molecular Orbital Theory:${\text{CN}}^{-}$ ($14e^{-}$): Isoelectronic with ${\text{N}}_2$, Bond Order $=3.0$.$\text{CN}$ ($13e^{-}$): Bond Order $=2.5$.${\text{CN}}^{+}$ ($12e^{-}$): Bond Order $=2.0$.$\text{NO}$ ($15e^{-}$): Bond Order $=2.5$.${\text{CN}}^{-}$ has the highest bond order.