Question

What is the difference between Keesom interactions and London dispersion forces?

Answer 1

Intermolecular forces are the forces that conciliate between molecules, including forces of attraction or repulsion which act between atoms and other types of neighbouring particles, e.g. atoms or ions. The intermolecular forces are weaker than intermolecular forces.

Complete answer:
The Difference between Keesom Interaction and London dispersion forces are as follows:

Keesom Interaction	London dispersion Forces
The Keesom interaction happens from a permanent dipole in another permanent dipole. It is the electrostatic interaction among the permanent dipoles of polar molecules. This can be conjointly referred to as permanent dipole-dipole force.	The London dispersion force could be a non-permanent attraction that happens when the electrons in $2$ adjacent atoms occupy positions that make the atoms form non-permanent dipoles. This can be conjointly referred to as induced dipole-induced dipole attraction.
The Keesom interactions are stronger than London dispersion forces in small molecules. But in larger molecules, Keesom interactions are weaker than London dispersion forces.	In chemical bonding, the weakest intermolecular force is the London dispersion force. But in larger molecules, London dispersion forces are stronger than Keesom interactions.
Keesom interaction is that the result of $2$ permanent dipoles that arise between $2$ two polar molecules.	The London dispersion force is that the result of non-permanent dipole moments caused by asymmetrical distribution of electrons.
Keesom interactions occur when induced negative end and induced positive end attract each other.	In London dispersion force, an atom or molecule will develop a non-permanent dipole due to the constant motion of electrons, once its electrons are distributed asymmetrically concerning the nucleus.

Note:
Remember dispersion forces are present between all molecules, whether they are polar or nonpolar whereas Keesom interaction occurs only in polar molecules. The London dispersion forces tend to be stronger between molecules that are easily polarized whereas weaker between the molecules that are not easily polarized.