The correct order of bound orders of $C _{2}^{2-}, N _{2}^{2-}$ and $O _{2}^{2-}$ is, respectively.
$C _{2}^{2-}< N _{2}^{2-}< O _{2}^{2-}$
$O _{2}^{2-}< N _{2}^{2-}< C _{2}^{2-}$
$C _{2}^{2-}< O _{2}^{2-}< N _{2}^{2-}$
$N _{2}^{2-}< C _{2}^{2-}< O _{2}^{2-}$
Number of paramagnetic oxides among the following given oxides is ..... .
$\mathrm{Li}_{2} \mathrm{O}, \mathrm{CaO}, \mathrm{Na}_{2} \mathrm{O}_{2}, \mathrm{KO}_{2}, \mathrm{MgO}$ and $\mathrm{K}_{2} \mathrm{O}$
The correct bond order in the following species is
Out of the following which has smallest bond length
Write electron configuration, bond order and Magnetic property of Hydrogen $\left( {{{\rm{H}}_2}} \right)$ molecule.
Which of the following statement is correct for peroxide ion
$A.$ has completely filled $\pi$ antibonding molecular orbitals
$B.$ is diamagnetic
$C.$ has bond order one
$D.$ is isoelectronic with Neon