The most effective coagulating agent among th | vedclass

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(B) $Sb_2S_3$ is a negatively charged sol. According to the Hardy-Schulze rule,the coagulating power of an electrolyte depends on the valency of the i

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$Al_2(SO_4)_3$

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(B) $Sb_2S_3$ is a negatively charged sol. According to the Hardy-Schulze rule,the coagulating power of an electrolyte depends on the valency of the ion carrying a charge opposite to that of the colloidal particles.Since $Sb_2S_3$ is a negative sol,it requires a positive ion for coagulation.The coagulating power increases with the increase in the magnitude of the charge on the cation.The valencies of the cations are: $Na^+$ $(+1)$,$NH_4^+$ $(+1)$,and $Al^{3+}$ $(+3)$.Since $Al^{3+}$ has the highest valency,$Al_2(SO_4)_3$ is the most effective coagulating agent.

The most effective coagulating agent among the following for $Sb_2S_3$ sol is

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