Question

Peptization is a process of:
A. Precipitating colloidal particles.
B. Purifying colloidal particles.
C. Dispersing the precipitate into colloidal state.
D. None of the above.

Answer 1

Hint: To bring in our knowledge, in nanoparticle synthesis, peptization is often used to make a large group of particles break into several primary particles. This is accomplished by altering the properties of the surface, applying a charge, or adding a surfactant. It is also called Deflocculation. This process plays a very important part in chemistry.

Complete step by step answer:
We understand that peptization is a mechanism by which a precipitate is transferred to colloidal particles when sufficient electrolytes are applied. The added electrolyte is called a peptizing agent.
For example, by adding a small amount of ferric chloride solution to the freshly precipitated ferric hydroxide, a reddish brown coloured colloidal solution is obtained.
In colloid chemistry or for precipitation reactions in an aqueous solution, this is especially important. If colloidal particles have the same electrical charge symbol, they repel each other and are unable to aggregate together.
It is incredibly difficult to filter freshly precipitated aluminium or iron hydroxide since the very small colloidal particles move through a paper filter directly. The colloidal suspension must first flocculate by applying a concentrated solution of salt to the system in order to allow filtration. . The electrical charges present on the particles' surface are "neutralised" in this way and vanish.
Peptization is a process of dispersing the precipitate into a colloidal state.
Option C is correct as Peptization is a process of dispersing the precipitate into colloidal state. Peptization is the method of turning a precipitate into a colloidal sol by shaking it in the presence of a small amount of electrolyte with a dispersion medium. The method responsible for the production of transforming precipitate into colloid by shaking an electrolyte with it is peptization or deflocculation.

So, the correct answer is Option C.

Note: To bring into notice, a colloid is a mixture that has particles with a diameter ranging from $1 - 1000$ nanometres, but can still remain uniformly distributed in the solution. As the compounds remain scattered and do not settle to the bottom of the bottle, these are also known as colloidal dispersions. In purification, the ultra-filtration procedure is used to isolate colloids from crystalloids. In ultrafiltration, over a wire mesh, the ultrafilter is assisted and the impure sol is poured over it. The particles of impurity pass through the ultrafilter while preserving the larger colloidal particles.