Question

Examples of lyophilic colloids are (This question has multiple correct options)
A. Albumin
B. RBC
C. Smoke
D. Metasulphide

Answer 1

Hint: Lyophilic: Lyo = liquid and philic = loving, lyophilic = liquid loving. Colloids = mixtures. Lyophilic colloids are liquid loving colloids.

Complete step-by-step answer:
We know that a colloid is primarily a heterogeneous mixture in which the minute particles of one substance are dispersed in another substance, called the dispersion medium. We should call a lyophilic colloid when the dispersed phase is separated from the dispersion medium. Moreover, they are difficult to coagulate due to their stable nature.

We should know that Albumin is a water-soluble protein made in the liver and circulated throughout the body by the blood stream. So if it is water soluble then it is water loving off course. So we should consider it as lyophilic colloids.

RBC: (Red Blood Cells): Red Blood Cells are suspended in plasma. So it is also an example of lyophilic colloid.

Smoke is a type of aerosol. In which dispersed phase is solid and dispersed medium is gas.

Metasulphide is not a colloid.

From the above statements, we now know that our correct is option A and option B.
Because Albumin is water soluble protein that means it is water loving and suspended in water to form lyophilic colloids.
And option B that is RBC. They are suspended in plasma and plasma is a liquid so it is fulfilling the condition to be lyophilic colloid.

Additional information:
Dispersed phase: it is minute solute particles
Dispersed medium: in which minute particles are suspended.
A common method of classifying colloids is based on the phase of the dispersed substance and what phase it is dispersed in. The types of colloids are
Sol is a colloidal suspension with solid particles in a liquid.
Emulsion is between two liquids.
Foam is formed when many gas particles are trapped in a liquid or solid.
Aerosol contains small particles of liquid or solid dispersed in a gas.

Note: We should learn the concept of colloids. We should know that lyophilic (liquid loving) Colloids are characterized by strong affinity of the dispersion media molecules for the surface molecules of the dispersed phase. And on the other hand Lyophobic (liquid hating) Colloids consist of the phases, which do not interact between each other.
We should note that there are particular cases of lyophilic and lyophobic colloids. Such as:-
Hydrophilic - water loving
Hydrophobic - water hating
Lipophilic - oil loving
Lipophobic - oil hating