Question

Which type of colloid is cheese?

Answer 1

Hint: The colloids are the heterogeneous mixture, where the small dispersed particles are suspended over the other compound. There are various classification of colloids based on their physical state. The cheese is classified under colloids where solid acts as a dispersion medium and liquid acts as dispersed phase.

Complete step by step answer:
Colloids are defined as a mixture where the dispersed particles of one compound are suspended over the other compound. The colloids are also known as colloidal solutions where the size of the suspended particles ranges from 1 to 1000 nanometers.
In the colloids, the substance which is dispersed is called the dispersed phase and the substance by which the dispersion is happening is known as continuous phase. The stable colloids are also called as lyophilic sols where a strong force of attraction is attained between the dispersed phase and dispersion medium.
Based on the physical state, the colloids are classified as shown below.
(1) Solid solution: In solid solution the dispersed phase is the solid and dispersion medium is liquid. Example of a solid solution colloid is gemstone.
(2) Aerosol: Aerosol is the colloid where the dispersion medium is the air. Example of aerosol is clouds.
(3) Gels: Gels are the colloids which contain solid as a dispersion medium and liquid as the dispersed phase. Examples of gels are butter, cheese.
(4) Emulsion: Emulsions are the colloids I which both the dispersed phase and dispersion medium is liquid.
Thus, cheese is the colloid which comes under the gels.

Note: In colloidal solution or colloids tyndall effect can be seen where the beam of incident light collides with the suspended particles and as a result scattering of light takes place.