What is the bond order of the $CO$ molecule?

Among the following species $N_{2}$,$N_{2}^{+}$,$N_{2}^{-}$,$N_{2}^{2-}$,$O_{2}$,$O_{2}^{+}$,$O_{2}^{-}$,$O_{2}^{2-}$,the number of species showing diamagnetism is:

Which of the following has the minimum bond length?

Which of the following is incorrect regarding the conversion of $N_2$ and $O_2$ into their respective monocations $N_2^+$ and $O_2^+$?

Stability of the species $Li_2$, $Li_2^-$, and $Li_2^+$ increases in the order of:

Which one of the following molecules is paramagnetic?