What is intermolecular force and van der Waals forces ? Which forces are not included in it ? Explain its types and uses ?

Explanation

Inter Molecular Forces : Inter molecular forces are the forces of attraction and replusion between interacting particles.
This term does not inclde the electrostatic forces that exist between the two oppositely charged ions the forces that hold atoms of a molecule together i.e., covalent bonds.
van der Waals Forces : Attractive intermolecular forces are known as van der Waals forces. In honour of Dutch scientist Johannes van der Waals (187 - 1923), who explained the deviation of real gases from the ideal behaviour through these forces.
Under forces are not considered as van der Waals forces.
(i) Attraction force between an ion and dipole
(ii) Forces present between Atoms of molecule of covalent bond.
(iii) Attractive forces between an ion and a dipole are known as ion - dipole forces.
Van der Waals forces vary considerably in magnitude.
(i) dispersion forces of London forces.
(ii) dipole - dipole forces.
(iii) dipole - induced dipole forces.
Deviation between ideal gas and real gas is explain by the help of van der Waals forces.