Question

What is Peptization?
A. Digestion of food
B. Hydrolysis of proteins
C. Breaking and dispersion into colloidal state
D. Precipitation of a solid from colloidal state

Answer 1

In order to the question, to know the right option, we should go through the definition and properties of peptization. This process is also known as Deflocculation.

Complete answer: The dispersion of a freshly precipitated material into a colloidal solution by the action of an electrolyte in solution is termed peptization which involves breaking a larger particle into colloidal range.Peptization process involves a peptizing agent. It is an electrolyte which is used to pass a precipitate into colloidal particles. This is done by shaking the precipitate with dispersion medium or the peptizing agent. Or, in other words this process is done by breaking the precipitate and then dispersed into the colloidal state.Peptization is a process of passing of a precipitate into colloidal particles on adding suitable electrolyte. The electrolyte added is known as peptizing agent. A few examples of sols obtained by peptization are given below:
$*$ A reddish brown colored shaded colloidal arrangement is acquired by adding little amount of ferric chloride answer for the newly hastened ferric hydroxide.
$*$ A precipitate of silver iodide can be peptized by shaking with a dilute solution of silver nitrate.

Hence, the correct option is (C.) breaking and dispersion into colloidal state.

Note: Cause of peptization: As the electrolyte is added to a newly precipitated substance, the particles of the precipitate specially adsorb one specific kind of particles of the electrolyte and get dispersed because of electrostatic repulsion. This gives particles of colloidal size. Newly arranged precipitates are favored where the particles are prepared and expected to be in the colloidal solution.