MCQ
The molecules having square pyramidal geometry are
- ✓$\mathrm{BrF}_{5} \& \mathrm{XeOF}_{4}$
- B$\mathrm{SbF}_{5} \& \mathrm{XeOF}_{4}$
- C$\mathrm{SbF}_{5} \& \mathrm{PCl}_{5}$
- D$\mathrm{BrF}_{5} \& \mathrm{PCl}_{5}$

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$\mathop { - CH{{(C{H_3})}_2}}\limits_1 \,\,\,\,\,\,\,\,\,\,\,\mathop { - C{H_2}C{H_2}Br}\limits_2 \,\,\,\,\,\,\,\,\,\,\mathop{ - C{H_2}Br}\limits_3 \,\,\,\,\,\,\,\,\,\mathop{ - C{{(C{H_3})}_3}}\limits_4$
$I = II = III = IV$

$(I)$ Low enthalpy of dissociation of $F-F$ bond
$(II)$ High hydration enthalpy of $F^-$
$(III)$ Low atomisation enthalpy of $F_2$