As_2S_3 sol has a negative charge. The maximu | vedclass

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(D) According to the Hardy-Schulze rule,the coagulating power of an electrolyte depends on the valency of the active ion (the ion carrying a charge op

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$0.1 \, N \, AlCl_3$

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(D) According to the Hardy-Schulze rule,the coagulating power of an electrolyte depends on the valency of the active ion (the ion carrying a charge opposite to that of the colloidal sol).Since $As_2S_3$ sol is negatively charged,the coagulating power depends on the valency of the cation.The cations present in the given options are:$A) \, Zn^{2+}$$B) \, Na^+$$C) \, Zn^{2+}$$D) \, Al^{3+}$According to the Hardy-Schulze rule,the higher the valency of the flocculating ion,the greater is its coagulating power.Comparing the valencies: $Al^{3+} (3) > Zn^{2+} (2) > Na^+ (1)$.Therefore,$AlCl_3$ has the maximum coagulating power.

$As_2S_3$ sol has a negative charge. The maximum coagulation power will be of:

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