The boiling points of noble gases are illustrative of the operation of forces of the type:

In solid argon,the atoms are held together by

The ionic compound $BaSO_4$ is insoluble in water due to

What is the dependence of interaction energy on the distance $(r)$ between molecules for the following forces?
$(i)$ London forces
$(ii)$ Dipole-dipole forces (stationary)
$(iii)$ Dipole-induced dipole forces

The relative strength of interionic/ intermolecular forces in decreasing order is:

On what factors does the magnitude of London dispersion forces depend?