Question

A sol of $AgI$ is prepared by mixing equal volumes of $0.1MAgN{O}_3$ and $0.2MKI$, which of the following statement is correct ?

• A. Sol obtained is a negative sol with $N{O}_3^{-}$ adsorbed on $AgI$
• B. Sol obtained is a positive sol with $A{g}^{+}$ adsorbed on $AgI$
• C. Sol obtained is a positive sol with $K^{+}$ adsorbed on $AgI$
• D. Sol obtained is a negative sol with $I^{-}$ adsorbed on $AgI$

Answer 1

Answer: (D)

Given reaction is,

$AgN{O}_3+KI\to Agl(Sol)+KN{O}_3$

Here, the amount of $AgN{O}_3$ present is $0.1M$.

Amount of $KI$ present is $0.2M$.

Since $KI$ is excess here, thus, sol obtained is a negative sol with $I$ adsorbed on $AgI$.