A cobalt amine has the formula $C o {(N H_{3})}_{6} C l_{3},$ with ${AgNO}_{3}$ solution, one-third of the chloride is Precipitated. The complex shows cis-trans isomerism. It can have the structure:

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$[C o {(N H_{3})}_{5} C l] C l_{2}$

$[C o {(N H_{3})}_{6}] C l_{3},$

$[C o {(N H_{3})}_{5} . H_{2} O] C l_{3}$

$[C o {(N H_{3})}_{4} C l_{2}] C l$

answer is C.

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Detailed Solution

This compound has only one ionizable $C l^{-}$ out of given three
$[C o {(N H_{3})}_{4} C l_{2} \overset{}{⇌} {[C o {(N H_{3})}_{4} C l_{2}]}^{+} + C l^{-}$

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