The inter-molecular forces are the force of attraction between molecules.
Hydrogen bond : it is an effective force of attraction between a highly electronegative element (F, O or N) and a hydrogen bonded to a highly electronegative element (F, O or N).
Dipole dipole force: it is present in polar molecules.
Dispersion force: these forces are present in all molecules however in non polar molecules this force of attraction is primary force.
Methanol : hydrogen bond
carbon tetrafluoride : dispersion force
Hydrogen sulfide : dipole-dipole forces
