Answer the question on the basis of passage given below:

Adsorption is a surface phenomenon which can be expressed by means of an emprical relationship known as Freundlich Adsorption isotherm. The relationship is given by

\(\frac{x}{m} = KP^{\frac{1}{n}}\left(n > 1\right)\)

\(x = \)Mass of the gas adsorbed

\(m = \)Mass of adsorbent

\(P = \)Pressure at which adsorption takes place

\(K\) and \(n\) are constant

When water is the dispersion medium, the colloidal system is called

Aquasol

The correct answer is option 3. Aquasol.

A colloidal system consists of two phases: a dispersed phase and a dispersion medium. The dispersed phase consists of finely divided particles, called colloidal particles, which are dispersed throughout the dispersion medium. The dispersion medium is the continuous phase in which the colloidal particles are dispersed.

In colloidal systems, the dispersion medium is the medium in which the colloidal particles are dispersed. It can be a solid, liquid, or gas. When water serves as the dispersion medium, the colloidal system is referred to as an "aquasol."

An aquasol is a colloidal system where water is the dispersion medium. In an aquasol, the colloidal particles are dispersed throughout water. These colloidal particles can be solid, liquid, or gas, depending on the specific aquasol. For example, milk is an aquasol where liquid fat droplets are dispersed in water, while fog is an aquasol where tiny water droplets are dispersed in air.

Sol: When a solid is the dispersion medium, the colloidal system is called a "sol." An example is a gelatin sol, where gelatin molecules are dispersed in water.

Organosol: When an organic solvent is the dispersion medium, the colloidal system is called an "organosol." An example is an ink, where pigment particles are dispersed in an organic solvent.

Aerosol: When a gas is the dispersion medium, the colloidal system is called an "aerosol." An example is fog, where water droplets are dispersed in air.

In summary, when water is the dispersion medium in a colloidal system, the system is called an aquasol. This term is used to describe colloidal systems where water plays the role of dispersing the colloidal particles throughout its medium.