The interactions are known as London dispersion forces.
Explanation:
It is widely known that the electron density distribution in polar and nonpolar molecules is not uniform and not static. In most cases, the electron density in any molecule will adjust to create a spontaneous dipole. In the presence of nonpolar solute and nonpolar solvent, the spontaneous dipoles have a propagating effect on the interaction. If molecule A produces a spontaneous dipole, then the electron density in the other molecule B will react by creating an opposite spontaneous dipole. The dipoles have interactive forces known as the London dispersion forces.The magnitudes of these forces increase with increase in the surface area of the molecule. Therefore, molecules with larger surface areas will have stronger London dispersion forces than those with smaller surface areas.
