Which of the following electrolytes is least effective in causing flocculation of ferric hydroxide sol [MNR 1991; UPSEAT 1999]

Which of the following electrolytes is least effective in causing floc

1.	Which of the following electrolytes is least effective in causing flocculation of ferric hydroxide sol [MNR 1991; UPSEAT 1999]
A.	\[{{K}_{4}}[Fe{{(CN)}_{6}}]\]
B.	\[{{K}_{2}}Cr{{O}_{4}}\]
C.	\[KBr\]
D.	\[{{K}_{2}}S{{O}_{4}}\]
Answer» D. \[{{K}_{2}}S{{O}_{4}}\]

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Which of the following electrolytes is least effective in causing flocculation of ferric hydroxide sol [MNR 1991; UPSEAT 1999]

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