question_answer 53)

    Which of the following electrolytes will have maximum coagulating value for Ag/Ag+ sol? (a) Na2S                                (b) Na3PO4        (c) Na2SO4                           (d) NaCI

Answer:

                    (b) According to Hardy-SchuIze law, greater the charge on anion greater will be its coagulating power.                

Electrolytes	Anionic part	Charge on anion
		2
		3
		2
		1

                Here,  have highest charge. Hence,  have highest coagulating power.