Which electrolyte is most effective in causing coagulation of ferric hydroxide sol?
Which electrolyte is most effective in causing coagulation of ferric hydroxide sol?
(a) KBr
(b) K2SO4
(c) K3CrO4
(d) K3[Fe(CN)6]
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Correct Option (d) K3[Fe(CN)6]
Explanation:
Ferric hydroxide is a positive sol, thus coagulated by negative ions (like Br-, SO42-, CrO42- and [Fe(CN)6]3-). More is the valency of negative ion, more is the coagulating power.
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