The electrolyte most effective for bringing about coagulation of Fe (OH)3 sol is
(a) K4[Fe(CN)6]
(b) BaCl2
(c) NaCl
(d)
Correct option (a) K4 [Fe(CN)6]
Explanation:
Fe(OH)3 is positive sol. K3 [Fe(CN)6] will provide [Fe(CN)6]4– for coagulation.
