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(D) Arsenic sulphide $As_2S_3$ is a negatively charged sol. It will be coagulated by ions carrying a positive charge. In the given options,the cations

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Aluminium nitrate

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(D) Arsenic sulphide $As_2S_3$ is a negatively charged sol. It will be coagulated by ions carrying a positive charge. In the given options,the cations are $Mg^{2+}$,$K^+$,$K^+$,and $Al^{3+}$. According to the Hardy-Schulze rule,the greater the valence of the coagulating ion,the greater is its coagulating power. Since $Al^{3+}$ has the highest positive charge $(+3)$,it has the maximum coagulating power. Therefore,the minimum concentration of $Al(NO_3)_3$ is required to coagulate the $As_2S_3$ sol.

List-$I$	List-$II$
$A$. Dialysis	$IV$. Purification of colloidal mixture
$B$. Peptization	$I$. Precipitate converts to colloidal mixture
$C$. Flocculation	$II$. Precipitation of colloidal mixture
$D$. Gold number	$III$. Protective power

The concentration of electrolyte required to coagulate a given amount of $As_2S_3$ sol is minimum in the case of

Similar Questions

Which of the following is a lyophobic colloidal solution?

Match the following:-

List-$I$ List-$II$

$A$. Dialysis $IV$. Purification of colloidal mixture

$B$. Peptization $I$. Precipitate converts to colloidal mixture

$C$. Flocculation $II$. Precipitation of colloidal mixture

$D$. Gold number $III$. Protective power

Identify the negatively charged sol from the following.

$100 \ mL$ of $0.0018\%(w/v)$ solution of $Cl^{-}$ ion was the minimum concentration of $Cl^{-}$ required to precipitate a negative sol in one $h$. The coagulating value of $Cl^{-}$ ion is $.......$ (Nearest integer).

For arsenious sulphide sol,which one of the following salt solutions will be most effective for coagulation?

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