A) \[ZnS{{O}_{4}}\]
B) \[N{{a}_{3}}P{{O}_{4}}\]
C) \[AlC{{l}_{3}}\]
D) \[{{K}_{4}}[Fe{{(CN)}_{6}}]\]
Correct Answer: C
Solution :
According to Hardy-Schuize rule "The amount of electrolyte required to coagulate a fixed amount of a sol depends upon the sign of charge and valency of the flocculating ion." Thus, the coagulating power vary in the order given below, \[A{{l}^{3+}}>Z{{n}^{2+}}>N{{a}^{+}}\]
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