Dipole - induced dipole forces : This type of attractive forces operate between the polar molecules having permanent dipole and the molecules lacking permanent dipole.
ex. `HCl - H_(2), CO_(2)` (non Polar) in air `O_(2)-H_(2)O`.
Formation of Dipole - Dipole forces :
Permanent dipole of the polar molecule induces dipole on the electrically neutral molecule by deforming its electronic cloud.
When permanent polar and non polar molecule come near to each other then dipole - induced dipole forces becomes reactive.
Permanent dipole of the polar molecule induces dipole on the electrically neutral molecule by deforming its electronic cloud.
So, polarity developed in non polar molecule.
There are attraction forces present between polar molecule (AB) and induced dipole molecule `(X_(2))`. Which is interaction forces between dipole molecule and non - polar molecule.
Characteristics : Thus an induced dipole is developed in the other molecule.
In this case also interaction energy is proportional to `1//r^(6)` where r is the distance between two molecules.
Induced dipole moment depends upon the dipole moment present in the permanent dipole and the polarisability of the electrically neutral molecule.
High polarisability increases the strength of attractive interactions.
In this case also cumulative effect of dispersion forces and dipole - induced dipole interactions exists.
