Question

Peptization is a :

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Answer 1

The process of converting a precipitate into colloidal sol by shaking with dispersion medium in the presence of a small amount of electrolyte​ is called peptization.

Process of peptization:
The precipitate adsorbs electrolyte ​ions on its surface​. This causes the development of positive or negative charge on precipitates,​ which ultimately break up into smaller particles of colloid size.​
Example:
Freshly precipitated $Fe(OH{)}_3$ ​is shaken with aqueous ​solution of $FeC{l}_3$.​