Question

According to Hardy Schultz rule, correct order of flocculation value for Fe(OH)₃ sol is : 

(1) K₂CrO₄ > K3[Fe(CN)₆] > KNO₃ > KBr = AlCl₃ 

(2) K₃[Fe(CN)₆] > K₂CrO₄ > KNO₃ = KBr = AlCl₃ 

(3) K₃[Fe(CN)₆] < K₂CrO₄ < KNO₃ = KBr = AlCl₃ 

(4) KNO₃ > KBr = K₂CrO₄ > AlCl₃ = K₃[Fe(CN)₆] 

Answer 1

Answer: (3) K₃[Fe(CN)₆] < K₂CrO₄ < KNO₃ = KBr = AlCl₃ 

According to hardy-schultz rule,

Coagulation value or flocculation value ∝ 1/Coagulation power