A mixed combination in which solute particles are larger than molecules or ions that cannot be seen with the naked eye is called a colloidal solution. A familiar mixture of two substances, one of which, called the dispersed phase, is regularly destroyed, the other is delivered in an exceptionally divided state through the second substance, called the dispersion phase. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an Original Essay The dispersion phase can be a gas, a liquid, or a solid, and the dispersed phase can also be any of these, excluding a gas in the other. A system of colloidal particles dispersed in a gas is called an aerosol. A colloid with water in the dispersed phase is called a hydrosol. There is no clear line of differentiation between true solutions and colloidal systems or between simple slowdowns and colloidal systems. When the particles of the dispersed phase have a diameter smaller than about 10-3 µm, the system begins to take on the characteristics of a true solution; when the dispersed particles are much larger than 1 µm, the departure of the dispersed phase from the dispersing phase becomes so rapid that the system is best considered as a suspension. According to this last criterion, natural clouds present in the atmosphere should not be defined as aerosols; however, since many cloud forms apparently show characteristics of true colloidal suspensions, this rigorous physicochemical definition is often ignored for determinations of appropriate and useful analogy. Condensation nuclei and many unnatural fumes can be considered aerosols. The dispersion phase can be a gas, a liquid or a solid. Smoke is composed of a solid dispersed in gas. Milk is a liquid dispersed in a liquid. Pumice stone is a gas dispersed in solids. There are two forms of colloidal systems. Sol: A system composed of a non-viscous colloidal solution is called a sol. For example milk.Gel: A system composed of viscous colloidal solution is called gel. On the other hand, for example, the colloidal system can be characterized into two general classes based on their empathy for liquids: Lyophilic system: The system in which the dispersed phase and the liquid dispersion phase attract each other is called the lyophilic.Lyophobic system: The system in which the dispersed phase and the liquid dispersion phase repel each other is called lyophobic system. Types of colloidal dispersions: The dispersed phase and the dispersion phase can be solid, liquid or gaseous. Depending on the state of the dispersed phase and the dispersion phase, eight different types of colloidal dispersions can exist. Eight different types of colloidal dispersions are: Foam; Solid foam; Liquid; Aerosol emulsions; Gel; Solid; Aerosol; Sol; Solid sol.It is important to note that when a gas is mixed with another gas, a similar mixture is formed, that is, the gases are completely miscible with each other. Colloidal dispersions are of various nature and gas dispersed in another gas phase does not form a colloidal system. When the dispersion phase is gaseous, the solution is called an aerosol and when the dispersion phase is liquid, the colloidal dispersion is known as a sol. Sols can be further classified into different types depending on the liquid used. If the liquid used is water, the solution is Hydrosol or Aquasol. If the liquid used is benzene, the solution is called Benzosol. If the liquid used is alcohol, the solution is alcohol. If an organic compound is used, the solution is Organosol.Properties of colloidal system: The colloidal system exhibits the following properties.Adsorption: The affinity of molecules and ions to follow on the surface of certain:.