A) \[CaC{{l}_{2}}\]
B) \[NaCl\]
C) \[AlC{{l}_{3}}\]
D) \[N{{a}_{2}}S{{O}_{4}}\]
Correct Answer: C
Solution :
The amount of electrolyte required to coagulate a certain amount of gold sol is minimum in case of \[\text{AlC}{{\text{l}}_{\text{3}}}\text{.}\]
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