P-Block Elements Questions

It is because of inability of $n{s}^2$ electrons of the valence shell to participate in bonding that:

In which pair of ions both the species contain $\text{S}-\text{S}$ bond?

Match the interhalogen compounds of column I with the geometry in column II:Column I(a) $X{X}^{\prime }$ (b) $X{X}_3^{\prime }$ (c) $X{X}_5^{\prime }$ (d) $X{X}_7^{\prime }$ Column II(i) T-shape(ii) Pentagonal bipyramidal(iii) Linear(iv) Square-pyramidal