The bond order and magnetic property of acetylide ion are same as that of $........$.

Explain the formation of $H_{2}$ and the energy level diagram of the $H_{2}$ molecule.

Select the incorrect statement about $N_2$ molecule.

Answer the following questions:
$(i)$ Give the molecular orbitals and their types formed by $LCAO$ from $2s, 2p_{x}, 2p_{y}$ and $2p_{z}$ atomic orbitals.
$(ii)$ Provide the energy order of molecular orbitals for $Li_{2}, Be_{2}, C_{2}, N_{2}, O_{2}$ and $F_{2}$.

If the bond order in $C_2$ is '$x$',then the bond order in $B_2$ and $O_2$,respectively,are

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.