GENERAL KNOWLEDGE

Detailed explanation-1: -Van der Waals forces are a group of interactions between atoms and/or within individual molecules that take place based upon the interaction of electron clouds surrounding two polar systems. These series of attractions and repulsions form as a consequence of polarization fluctuation between neighboring particles.

Detailed explanation-2: -Van der Waals forces are weak electrostatic forces that attract neutral molecules to one another. Particles in liquid or air vibrate and move constantly. Thus, they collide with other particles, including the media’s particles such as water molecules-the process known as Brownian motion (Figure 50).

Detailed explanation-3: -Van der Waals forces are a type of intermolecular force that occurs because of dipole-dipole interactions. London dispersion force is a sub-type of the Van der Waals force that is predominant in non-polar molecules. An intermolecular force is a force occurring between two different molecules.

Detailed explanation-4: -Van der Waals forces are weak interactions between molecules that involve dipoles. Polar molecules have permanent dipole-dipole interactions. Nonpolar molecules can interact by way of London dispersion forces.