which of the following is most effective electrolyte in the coagulation of AgI/ Ag+sol?

K2SO4 , MgCl , K4[Fe(CN)6] .

According to the Hardy-Schulze rule - the greater the valence of the flocculating ion the greater is its ability to bring about coagulation.

Therefore, K4[Fe(CN)6] will be the most effective in coagulating AgI/Ag+ (positively charged sol).

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