For a positive sol, which of the following ha | vedclass

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(D) According to the Hardy-Schulze rule, the coagulation power of an electrolyte depends on the valency of the ion carrying a charge opposite to that

Vedclass · Accepted Answer

$[Fe(CN)_6]^{4-}$

Vedclass · Answer

(D) According to the Hardy-Schulze rule, the coagulation power of an electrolyte depends on the valency of the ion carrying a charge opposite to that of the colloidal particles.
For a positive sol, the effective coagulating ions are anions.
Coagulation power $\propto$ Valency of the effective ion.
Comparing the valencies of the given anions:
$NO_3^-$ (valency = $1$)
$SO_4^{2-}$ (valency = $2$)
$PO_4^{3-}$ (valency = $3$)
$[Fe(CN)_6]^{4-}$ (valency = $4$)
Since $[Fe(CN)_6]^{4-}$ has the highest valency, it has the maximum coagulation power.

For a positive sol, which of the following has the maximum coagulation power?

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