A) \[NaCl\]
B) \[BaC{{l}_{2}}\]
C) \[{{K}_{2}}Cr{{O}_{4}}\]
D) \[{{K}_{3}}[Fe\,{{(CN)}_{6}}]\]
Correct Answer: D
Solution :
According to Hardy-SchuIze rule, The coagulating power of an electrolyte is directly proportional to the fourth power of the valency of the effective ion. For a positively charged solution of \[Fe{{(OH)}_{3}}\]the order of coagulating power is as \[{{\left[ Fe\,{{(CN)}_{6}} \right]}^{3-}}>CrO_{4}^{2-}>C{{l}^{-}}\]
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