What are the three main types of intermolecular forces?

Dispersion force, dipole, and perhaps hydrogen .

Dipole happens due to . The partial charges make the different charges in the molecules attract each other. Ion-dipole is also possible. The only difference is that an ion has charge instead of partial charge.

Dispersion force occurs on any molecule, polar or nonpolar. Even for nonpolar molecules, a sudden shift of electrons can give it brief polarity, which makes partial charge, which then induces charges in nearby molecules. Dispersion force usually gets stronger as the molecule gets bigger and heavier.

are the force between the lone electron pair of F, O, or N and a hydrogen atom. It's because the mentioned three have the strongest .

Hope this helped!