Which one of the following molecules is paramagnetic?

When $O_{2}$ is converted into $O_{2}^{+}$,what happens to its paramagnetic character and bond order?

Which of the following statements are correct for the peroxide ion $(O_{2}^{2-})$?
$(i)$ It has a bond order of $1$.
$(ii)$ It is diamagnetic.
$(iii)$ It has four completely filled antibonding molecular orbitals.
$(iv)$ It is isoelectronic with neon.

Which one of the following molecules is expected to exhibit diamagnetic behaviour?

The bond order of $O_2^{+}$ is $x$. The bond orders of $O_2^{-}$ and $O_2^{2+}$ are respectively

Which of the following statements is correct?