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Question

The most effective electrolyte, in the coagulation of a positively colloidal solution is:

A
K4[Fe(CN)6]
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B
FeCl3
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C
MgSO4
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D
AlBr3
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Solution

The correct option is A K4[Fe(CN)6]
According to Hardy-Schulze Rule: Greater the valence of flocculating ion added, greater is its power to cause coagulation.
Among the given electrolytes, K4[Fe(CN)6] have the higher valence anion [Fe(CN)6]4

Most effective electrolyte in coagulation of above solution is K4[Fe(CN)6].

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