Write a note on Dipole-Induced Dipole forces.

(N/A) Dipole-induced dipole forces are attractive forces that operate between polar molecules (having a permanent dipole) and non-polar molecules (lacking a permanent dipole).
Formation: When a polar molecule with a permanent dipole approaches a non-polar molecule,it distorts the electronic cloud of the non-polar molecule. This induces a dipole in the previously neutral non-polar molecule.
Mechanism: The permanent dipole of the polar molecule induces a dipole on the electrically neutral molecule by deforming its electronic cloud. Consequently,polarity is developed in the non-polar molecule,leading to attractive forces between the polar molecule $(AB)$ and the induced dipole molecule $(X_2)$.
Characteristics:
- The interaction energy is proportional to $1/r^6$,where $r$ is the distance between the two molecules.
- The induced dipole moment depends on the dipole moment of the permanent dipole and the polarisability of the electrically neutral molecule.
- Higher polarisability increases the strength of attractive interactions.
- In such systems,there is a cumulative effect of dispersion forces and dipole-induced dipole interactions.