Solve this:

20. Find out the incorrect order of bond angles.

$$\begin{gathered} \left(1\right) \stackrel{}{\stackrel{\oplus }{N}{O}_2 >N{O}_2}>\stackrel{⊝}{N}{O}_2 \left(2\right) C{H}_4>N{H}_3>H_{2}O \\ \left(3\right) H_{2}O>H_{2}S >H_{2}Se \left(4\right) N{H}_3<P{H}_3<As{H}_3 \end{gathered}$$

21. Anhydrous AICI₃ is covalent,
If the energy to ionise $$\begin{gathered} AIC{I}_3 = 5215 kJ mo{l}^{-1}△H_{hydration} for A{I}^{3+} = 4670 KJ mo{l}^{-1} and △H_{hydration f} \\ for C{I}^{-} = -381 kJ mo{l}^{-1}, will it remain covalent or become ionic is aqueous soluions? \end{gathered}$$

(1) It will remain covalent.
(2) It will become ionic