The most effective coagulating agent for anti | vedclass

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(D) Antimony sulphide $(Sb_2S_3)$ sol is a negatively charged sol. According to the Hardy-Schulze rule,the coagulating power of an electrolyte depends

Vedclass · Accepted Answer

$Al_2(SO_4)_3$

Vedclass · Answer

(D) Antimony sulphide $(Sb_2S_3)$ sol is a negatively charged sol. According to the Hardy-Schulze rule,the coagulating power of an electrolyte depends on the valency of the active ion (the ion with a charge opposite to that of the colloidal particles). For a negatively charged sol,the coagulating power increases with the increase in the valency of the cation. The cations in the given options are: $A) Na^+$ (valency $1$) $B) Ca^{2+}$ (valency $2$) $C) NH_4^+$ (valency $1$) $D) Al^{3+}$ (valency $3$) Since $Al^{3+}$ has the highest valency $(3)$,it is the most effective coagulating agent for the negatively charged $Sb_2S_3$ sol.

List-$I$	List-$II$
$A$. Lyophilic colloid	$I$. Liquid-liquid colloid
$B$. Emulsion	$II$. Protective colloid
$C$. Positively charged colloid	$III$. $FeCl_3 + NaOH$
$D$. Negatively charged colloid	$IV$. $FeCl_3 + \text{hot water}$

The most effective coagulating agent for antimony sulphide sol is

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