(a) Draw the structures of the following molecules : (i) H_(3)PO_(2) (ii) CIF_(3) (b) Explain the following observations : (i) Nitrogen is much less reactive than phosphorus. (ii) Despite having greater polarity, hydrogen fluoride boils at a lower temperature than water . (iii) Sulphur has greater tendency for catenation than oxygen in the same group.

(a) Draw the structures of the following molecules : (i) H_(3)PO_(2)

1.	(a) Draw the structures of the following molecules : (i) H_(3)PO_(2) (ii) CIF_(3) (b) Explain the following observations : (i) Nitrogen is much less reactive than phosphorus. (ii) Despite having greater polarity, hydrogen fluoride boils at a lower temperature than water . (iii) Sulphur has greater tendency for catenation than oxygen in the same group.
Answer» Solution :(i) `H_(3)PO_(2)` (ii) `CIF_(3)` : Structure of `ClF_(3)`(g) (B) (ii)Water molecules has twice as many Hydrogen bonding does HF and therefore more INTERMOLECULAR ATTRACTION and HIGHER boiling point than HF.