Explanation:
Intermolecular forces are the forces of attraction and repulsion that exist between molecules or atoms. These forces play a crucial role in determining the physical properties of matter, such as melting and boiling points, viscosity, and solubility. However, not all types of forces are intermolecular forces. The correct option out of the given options is A, which states that Van der Waals forces are intermolecular forces, while the other options are not.

Van der Waals Forces:
Van der Waals forces are the weakest intermolecular forces of attraction that exist between molecules or atoms. These forces arise due to the temporary dipoles that occur when the electrons in the molecules or atoms are unevenly distributed. They are named after the Dutch scientist Johannes Diderik van der Waals, who was the first to describe these forces.

Types of Van der Waals Forces:
Van der Waals forces can be divided into two types:

1. London Dispersion Forces:
London dispersion forces are the weakest type of Van der Waals forces. They arise due to the temporary dipoles that occur when the electrons in the atoms or molecules are unevenly distributed. These temporary dipoles induce similar dipoles in nearby atoms or molecules, leading to attractive forces between them.

2. Dipole-Dipole Forces:
Dipole-dipole forces are stronger than London dispersion forces and arise due to the permanent dipoles that exist in some molecules. In these molecules, the electrons are not evenly distributed, leading to a separation of charge and the formation of a permanent dipole. The positive end of one dipole attracts the negative end of another dipole, leading to an attractive force between them.

Conclusion:
In conclusion, intermolecular forces are the forces of attraction and repulsion that exist between molecules or atoms. Van der Waals forces are the weakest type of intermolecular forces and arise due to the temporary dipoles that occur when the electrons in the atoms or molecules are unevenly distributed. Other types of forces, such as electrostatic forces between oppositely charged ions, covalent bonds between like atoms, and gravitational forces, are not intermolecular forces.

Intermolecular forces are that forces with exist between molecules... like vanderwall forces,,, London forces ,,,hydrogen bond forces these are the examples of intermolecular forces,, while electrostatic force covalent force these are the examples of intramolecular forces means that force which exist in molecules but not between the molecules and gravitational forces not act in between molecule...So A correct..