A) Formation of delta regions
B) Peptization
C) Treatment of drinking water by potash alum
D) Clotting of blood by the use of ferric chloride
Correct Answer: B
Solution :
Coagulation is the phenomenon of conversion of colloidal sol into precipitate while in peptization, a fresh precipitate is converged into sol by adding electrolyte. Hence, it is clear that peptization does not involve coagulation.
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