# NEET Chemistry The p-Block Elements (XII) Questions Solved

(a) Draw the structures of the following :

(i) $Xe{F}_{4}$                                                 (ii) ${H}_{2}{S}_{2}{O}_{7}$

(b) Explain the following observations :

(i) Phosphorus has a greater tendency for catenation than nitrogen.

(ii) The negative value of electron gain enthalpy is less for fluorine than that for chlorine.

(iii) Hydrogen fluoride has a much higher boiling point than hydrogen chloride.