A) \[NaCl\]
B) \[KCl\]
C) \[BaC{{l}_{2}}\]
D) \[AlC{{l}_{3}}\]
Correct Answer: A
Solution :
Hardy-SchuIze rule: The coagulating effect of an ion on dispersed phase of opposite charge increases with the valence of the ions. eg, For precipitating (coagulating) of an\[A{{s}_{2}}{{S}_{3}}\]sol (negative sol), the coagulating power of\[A{{l}^{3+}}\]\[B{{a}^{2+}},N{{a}^{+}}\]ions are in the order\[A{{l}^{3+}}>B{{a}^{2+}},>N{{a}^{+}}\]
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