Question

Which of the following pairs of complexes whose aqueous solutions gives pale yellow and white precipitates respectively with $0.1 \,M \,AgNO _{3}$ ?

• A. $\left[ Pt \left( NH _{3}\right)_{4} Br _{2}\right] Cl _{2}$ and $\left[ Pt \left( NH _{3}\right)_{4} Cl _{2}\right] Br _{2}$
• B. $\left[ Co \left( NH _{3}\right)_{5} NO _{3}\right] Br$ and $\left[ Co \left( NH _{3}\right)_{5} Br \right] NO _{3}$
• C. $\left[ Pt \left( NH _{3}\right)_{4} Cl _{2}\right] Br _{2}$ and $\left[ Pt \left( NH _{3}\right)_{4} Br _{2}\right] Cl _{2}$
• D. $\left[ Co \left( NH _{3}\right)_{5} NO _{3}\right] Cl$ and $\left[ Co \left( NH _{3}\right)_{5} Cl \right] NO _{3}$

Answer 1

Answer: (C)

$AgBr \rightarrow$ Pale yellow
$AgCl \rightarrow$ White