Which one of the following does not involve coagulation?
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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
answer is B.
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Detailed Solution
Peptization does not involve coagulation.Peptization is the process of converting a precipitate into colloidal particles by adding suitable electrolyte.Coagulation represents change of colloidal state to suspension state.Thus, coagulation and peptization represents opposite processes.