(a) Give reasons for the following :
(i) Bond enthalpy of is lower than that of .
(ii) has lower boiling point than .
(b) Draw the structures of the following molecules :
(i) (ii) (iii)
(a) (i) Due to smaller size of F than Cl as a result of which electron-electron repulsions between the lone pairs of electrons are very large than that of Cl, hence bond dissociation enthalpy of is less than that of .
(ii) has lower boiling point than because cannot form hydrogen bonds like .
(b) (i) :
Shape : Bent T-shape
(ii) : Cyclotrimetaphosphoric acid
Shape : Square planar