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Question

(A) The charge on a colloidal particle is determined by the preferential adsorption of ions from the dispersion medium.$1$. $[Fe(OH)_3]$ is a positive

Vedclass · Accepted Answer

$[Fe(OH)_3] : Fe^{3+}$

Vedclass · Answer

(A) The charge on a colloidal particle is determined by the preferential adsorption of ions from the dispersion medium.$1$. $[Fe(OH)_3]$ is a positively charged sol due to the adsorption of $Fe^{3+}$ ions.$2$. $[As_2S_3]$ is a negatively charged sol due to the adsorption of $S^{2-}$ ions.$3$. $[SnO_2]$ is a negatively charged sol due to the adsorption of $SnO_3^{2-}$ ions.$4$. $[AgI]$ formed by excess $AgNO_3$ adsorbs $Ag^+$ ions and becomes positively charged,not $I^-$.Therefore,the correctly matched pair is $[Fe(OH)_3] : Fe^{3+}$.

Which pair is correctly matched regarding the charge on the colloidal particle?

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