Which of the following complex will give white precipitate with BaCl2 (aq.)

A
$[Co {({NH}_{3})}_{4} {SO}_{4}] {NO}_{2}$
B
$[Cr {({NH}_{3})}_{5} {SO}_{4}] Cl$
C
$[Cr {({NH}_{3})}_{5} Cl] {SO}_{4}$
D
Both (b) and (c)

Solution:

$\begin{array}{l} [Cr {({NH}_{3})}_{5} Cl] {SO}_{4} \to {[Cr {({NH}_{3})}_{5} Cl]}^{2 +} + {SO}_{4}^{2 -} \\ {[Cr {({NH}_{3})}_{5} Cl]}^{2 +} + {SO}_{4}^{2 -} + {BaCl}_{2} \to \\ [Cr {({NH}_{3})}_{5} Cl] {Cl}_{2} + {BaSO}_{4} + HCl . \end{array}$

Which of the following complex will give white precipitate with ${BaCl}_{2} (aq.)$

Solution:

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