Question

The colloidal sol found effective in the treatment of eyes disease is;
A. Colloidal Sulphur
B. Colloidal antimony
C. Colloidal silver
D. Colloidal gold

Answer 1

Hint: Colloidal sol has solid particles suspended in a liquid medium, the size of the particles is in nanometers. Colloidal is one of the three primary types of the mixture (the other two are suspension and solution). The answer has the element which has good bacteria resistant properties.

Complete Step by step answer:
- Colloidal sol of gold and Sulphur is also used for the treatment of some diseases, these are discussed below.
- Colloidal sol of gold can be used as a supplement, it has been proven effective in reducing pain and swelling among arthritis patients.
- Colloidal sol of Sulphur is hydrophilic (water liking) and is capable of absorbing water to a considerable degree. It is also used in the treatment of skin disease due to its large surface area.
- The eye disease that uses a colloidal sol for treatment generally, is eye infections caused by bacterias, silver is known for its antibacterial property and is used in many bandages, disinfectant as a component.
Therefore, Colloidal sol of silver is used in the medical treatment of eye infections due to its antibacterial property.

Hence, the correct answer is option (C) i.e., colloidal silver.

Note: If a solution shows the Tyndall effect, then it can be labeled as a colloidal solution, a true solution does not show Tyndall effect. While preparing a colloidal solution the role of dispersion medium and the dispersed phase is very important, as this determines the type of the colloidal solution. E.g., emulsion (dispersed phase and dispersion medium – liquid), Aerosol ( dispersed phase- solids, liquids. Dispersion medium-gas), Foam (dispersed phase- gas, dispersion medium- solid-liquid)