State whether the bond order increases or decreases when $O_2$ changes to $O_2^+$ and when $N_2$ changes to $N_2^+$.

Which of the following is not paramagnetic?

The bond order and magnetic behaviour of $O_{2}^{-}$ ion are,respectively:

Given below are two statements:
Statement $(I)$: The correct sequence of bond lengths in the following species is:
$O_2^+ < O_2 < O_2^- < O_2^{2-}$
Statement $(II)$: The correct sequence of number of unpaired electrons in the following species is:
$O_2 > O_2^+ > O_2^- > O_2^{2-}$

Which of the following species shows the maximum bond length?

Total number of electrons present in $(\pi^*)$ molecular orbitals of $O_2$,$O_2^{+}$,and $O_2^{-}$ is ............