Answer :
The London dispersion force is the very weak intermolecular interaction due to the momentary changes in electron density in a molecule.
The weakest of these forces is one of the van der Waals forces the London dispersion force. It is the weak intermolecular forces resulting from the motion of electrons that create a temporary dipole in the molecule. Another important example of weak interaction phenomena is the nuclear fusion of hydrogen to helium that drives thermonuclear processes in the Sun.
Most fermions decay over time due to weak interactions. Ionic bonds are generally the weakest of the true chemical bonds that join atoms together. The London dispersion force is weaker than the interdipole force because it is weaker due to the instantaneous dipole. Dipole-dipole interactions are based on the interaction of a partially positively charged portion of one molecule with a partially negatively charged portion of an adjacent molecule.
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