i) What is peptization?
ii) What is the dispersed phase in a gel?
iii) Which one of the following electrolyte is required in the smallest quantity to precipitate a negative sol? `MgCl_(2). AICl_(3), NaCl`. 

Explanation

i) peptization: The process of conversion of freshly prepared precipitate into a colloidal solution by adding an eiectrolyte containing the common ion is called peptisation.
ii) Liquid is the dispersed phase in a gel.
iii) `AICI_(3)` is the electrolyte that is required in the smallest quantity to precipitate a negative sol.