Intermolecular forces are the forces of attraction and repulsion between interacting particles (atoms and molecules). This term does not include the electrostatic forces that exist between the two oppositely charged ions and the forces that hold atoms of a molecule together i.e., covalent bonds.

Among the given forces, the following are the Intermolecular forces,

1. Dipole-dipole forces act between the molecules possessing permanent dipole.
2. Dipole–Induced Dipole Forces type of attractive forces operate between the polar molecules having permanent dipole and the molecules lacking permanent dipole
3. Hydrogen bonding is a special type of dipole-dipole attraction between molecules, not a covalent bond to a hydrogen atom. It results from the attractive force between a hydrogen atom covalently bonded to a very electronegative atom such as a N, O, or F atom and another very electronegative atom.
4. In dispersion forces, Atoms and nonpolar molecules are electrically symmetrical and have no dipole moment because their electronic charge cloud is symmetrically distributed. But a dipole may develop momentarily even in such atoms and molecules