A) 100 m L of \[0.1\,\,M\,AgN{{O}_{3}}+100\,mL\] of 0.1 M KI
B) 100 mL of \[0.1\,\,M\,AgN{{O}_{3}}+100\,mL\] of 0.2 mKI
C) 100 mL of \[0.1\,\,M\,AgN{{O}_{3}}+100\,mL\] of 0.1 M KI
D) 100 mL of \[0.15\,\,M\,AgN{{O}_{3}}+100\,mL\] of 0.15 MKI
Correct Answer: B
Solution :
Negatively charged colloidal sol is formed when \[AgN{{O}_{3}}\] is completely precipitated as \[Agl\] and extra Kl is absorbed on \[Agl\]. \[A{{g}^{+}}+{{l}^{-}}\xrightarrow{{}}Agl\] \[A{{g}^{+}}+{{l}^{-}}\xrightarrow{{}}[Agl]{{l}^{-}}\] Thus, \[[A{{g}^{+}}]<[{{l}^{-}}]\]
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