MCQ
The group having isoelectronic species is :
- ✓$O^{-2} , F^-, Na^+, Mg^{2+}$
- B$O^-, F^-, Na, Mg^+$
- C$O^{-2} , F^-, Na, Mg^{2+}$
- D$O^-, F^-, Na^+, Mg^{2+}$
$\begin{array}{lcc}\hline \text { Ions } & {\text { Atomic number }} & {\text { Number of electrons }} \\ \hline 0^{2-} & {8} & {10} \\ {\mathrm{F}^{-}} & {9} & {10} \\ {\mathrm{Na}^{+}} & {11} & {10} \\ {\mathrm{Mg}^{2+}} & {12} & {10} \\ \hline\end{array}$
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$kJ\,mol ^{-1}$ (Nearest integer)
Given : $\Delta_{ dis } H _{ Cl _{2(g)}}^{\circ}=240\,kJ\,mol ^{-1}$.
$\Delta_{ eg } H _{ Cl _{(g)}}^{\circ}=-350\,kJ\,mol ^{-1}$,
$\Delta_{ hyd } H _{ Cl i _{( j )}^{\circ}}^{\circ}=-380\,kJ\,mol ^{-1}$
(Given: Molar mass of $Ag$ is $108\, g \,mol ^{-1}$ and that of $Cl$ is $35.5 \,g\, mol ^{-1}$ )