If a dilute solution of AgNO_3 is added to a | vedclass

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(C) When $AgNO_3$ is added to an excess of $NaI$,the $AgI$ precipitate is formed. According to the preferential adsorption theory,the common ion prese

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$I^-$

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(C) When $AgNO_3$ is added to an excess of $NaI$,the $AgI$ precipitate is formed. According to the preferential adsorption theory,the common ion present in excess in the dispersion medium is adsorbed on the surface of the colloidal particles. Here,$I^-$ ions are in excess,so they get adsorbed on the $AgI$ surface,forming a negatively charged sol: $[AgI]I^- / Na^+$.

If a dilute solution of $AgNO_3$ is added to a dilute solution of excess $NaI$,then the species adsorbed on $AgI$ colloidal particles is:

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