Which of the following electrolytes is least effective in causing flocculation of ferric hydroxide sol?
A. K4 [Fe(CN)6]
B. K2CrO4
C. KBr
D. K2SO4
Answer:C
Which of the following electrolytes is least effective in causing flocculation of ferric hydroxide sol?
A. K4 [Fe(CN)6] B. K2CrO4 C. KBr D. K2SO4