$$ \text { Observe the following sets. } $$

$$ \begin{array}{lll} \hline \text { Order } & \text { Property } \\ \hline \text { (i) } \mathrm{NH}_3>\mathrm{H}_2 \mathrm{O}>\mathrm{SO}_2 & \text { Bond angle } \\ \hline \text { (ii) } \mathrm{H}_2 \mathrm{O}>\mathrm{NH}_3>\mathrm{H}_2 \mathrm{~S} & \text { Dipole moment } \\ \text { (iii) } \mathrm{N}_2>\mathrm{O}_2>\mathrm{H}_2 & \text { Bond enthalpy } \\ \hline \text { (iv) } \mathrm{NO}^{+}>\mathrm{O}_2>\mathrm{O}_2^{2-} & \text { Bond order } \\ \hline \end{array} $$

Observe the following reactions. Identify the reaction in which the hybridisation of underlined atom is changed

Among the following species, correct set of isostructural pairs are $\mathrm{XeO}_3, \mathrm{CO}_3^{2-}, \mathrm{SO}_3, \mathrm{H}_3 \mathrm{O}^{+}, \mathrm{ClF}_3$

The correct order of bond angles of the molecules $\mathrm{SiCl}_4, \mathrm{SO}_3, \mathrm{NH}_3, \mathrm{HgCl}_2$ is