What is the weakest attractive force that can be observed between two molecules

Answer 1

The weakest force of attraction between two molecules is the dispersion force, also known as London dispersion force or induced dipole-induced dipole force. This is an intermolecular force that arises when temporary dipoles are induced in two adjacent molecules due to the fluctuations of their electron clouds. Although it is weak, it can still contribute significantly to the stability of the molecule and affect its physical properties.