1.

Among the electrolytes `Na_(2)SO_(4),CaCl_(2),As_(2)(SO_(4))_(3)` and `NH_(4)Cl,` the most effective coagulationf agent for `Sb_(2)S_(3)` negatively charged sol is :A. `Na_(2)SO_(4)`B. `CaCl_(2)`C. `Al_(2)(SO_(4))_(3)`D. `NH_(4)Cl.`

Answer» Correct Answer - C
`Al^(3+)` ion has the maximum coagulating capacity.


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