1.F>O>N>>Cl
2.cation-anion electrostatic and ion-dipole forces.
3.boiling point which increases with effectiveness of H-bonding between like molecules,and solubility,which increases with H-bonding between solute and solvent molecules.
4.H-O-H...O(H)-H...O(H)-H.
CH3-O-H.O(H)CH3
H-F...H-F...H-F
5.One molecule of HF H-bonds at the most with two other molecules,but each H2O molecule contributes both H's for H-bonding with the O's of two other molecules,and uses its O for H-bonding with an H of a third molecule.