A) \[N{{a}^{+}}<A{{l}^{3+}}<B{{a}^{2+}}\]
B) \[PO_{4}^{3-}<SO_{4}^{2-}<C{{l}^{-}}\]
C) \[Cl<SO_{4}^{2-}<PO_{4}^{3-}\]
D) \[A{{l}^{3+}}<B{{a}^{2+}}<N{{a}^{+}}\]
Correct Answer: D
Solution :
Key Idea: According to Hardy Schulz rule, the coagulating power of electrolyte increases with charge ion. \[\because \]\[A{{s}_{2}}{{S}_{3}}\]is negatively charged colloid and so it will be coagulated by cations. \[\therefore \]Correct order of coagulating power for \[A{{s}_{2}}{{S}_{3}}\] is\[A{{l}^{3+}}<B{{a}^{2+}}<N{{a}^{+}}\]
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