Chemistry - CHEMICAL BONDING Question with Solution | TestHub

$\mathrm{N}{\mathrm{a}}_2{\mathrm{O}}_2$or${{\mathrm{O}}_2}^{2-}=\mathrm{\sigma }1{\mathrm{s}}^2{\mathrm{\sigma }}^{\mathrm{*}}1{\mathrm{s}}^2,\mathrm{\sigma }2{\mathrm{s}}^2{\mathrm{\sigma }}^{\mathrm{*}}2{\mathrm{s}}^2,\mathrm{\sigma }2{{\mathrm{p}}_{\mathrm{Z}}}^2,\mathrm{\pi }2{{\mathrm{p}}_{\mathrm{X}}}^2=\mathrm{\pi }2{{\mathrm{p}}_{\mathrm{Y}}}^2,{\mathrm{\pi }}^{\mathrm{*}}2{{\mathrm{p}}_{\mathrm{X}}}^2={\mathrm{\pi }}^{\mathrm{*}}2{{\mathrm{p}}_{\mathrm{Y}}}^2$
Number of unpaired electrons = 0
$\mathrm{N}=\mathrm{N}\to \mathrm{O}$number of unpaired electrons$=0$
$\mathrm{O}={\mathrm{O}}^{\oplus }–{\mathrm{O}}^{-}\leftrightarrow \mathrm{O}=\mathrm{O}\to \mathrm{O}$
Number of unpaired electrons$=0$
$\mathrm{K}{\mathrm{O}}_2$or${{\mathrm{O}}_2}^{-}=\mathrm{\sigma }1{\mathrm{s}}^2,{\mathrm{\sigma }}^{\mathrm{*}}1{\mathrm{s}}^2\mathrm{\sigma }2{\mathrm{s}}^2,{\mathrm{\sigma }}^{\mathrm{*}}2{\mathrm{s}}^2,\mathrm{\sigma }2{{\mathrm{p}}_{\mathrm{Z}}}^2,\mathrm{\pi }2{{\mathrm{p}}_{\mathrm{X}}}^2=\mathrm{\pi }2{{\mathrm{p}}_{\mathrm{Y}}}^2,{\mathrm{\pi }}^{\mathrm{*}}2{{\mathrm{p}}_{\mathrm{X}}}^2={\mathrm{\pi }}^{\mathrm{*}}2{{\mathrm{p}}_{\mathrm{Y}}}^1$
Number of unpaired electrons$=1$
So${{\mathrm{O}}_2}^{-}$is paramagnetic.