According to molecular orbital theory,the number of unpaired electron$(s)$ in $O_{2}^{2-}$ is :

Match the following molecules/ions in List-$I$ with their respective bond orders in List-$II$:
| List-$I$ (Molecules/ions) | List-$II$ (Bond order) |
| :--- | :--- |
| $A. N_2^+$ | $I. 1.0$ |
| $B. CO$ | $II. 1.5$ |
| $C. O_2$ | $III. 2.0$ |
| $D. O_2^-$ | $IV. 2.5$ |
| | $V. 3.0$ |

What is the number of electrons present in antibonding orbitals of $N_2$ molecule according to molecular orbital theory?

Which of the following is paramagnetic?

In $Cl_2O_7$,the $\pi$-bond between $Cl$ and $O$ is formed by the overlapping of :-

Give the number of electrons in the species $H_2^+$,$H_2$,and $O_2^+$.