Why do alcohols have higher boiling points than halo-alkanes of the same molecular mass ?

Why do alcohols have higher boiling points than haloalkanes ?

Alcohols have higher boiling point than alkanes.Why ?

Why does water have high boiling point?

Why alcohols are higher boiling point than hydrocarbons of corresponding molecular masses ?

Amines have higher boiling points than hydrocarbons of comparable molecular masses.

Why has phenol, higher boiling point than toluene ?

Why amines have lower boiling points than alcohols of comparable molecular masses?

Account for the following : Nitro compounds have higher boiling points that the hydrocarbons having almost the same molecular mass.