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Q.

The complex that has highest crystal field splitting energy $(Δ)$ is

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a

$[Co {({NH}_{3})}_{5} Cl] {Cl}_{2}$

b

$[Co {({NH}_{3})}_{5} (H_{2} O)] {Cl}_{3}$

c

$K_{2} [{CoCl}_{4}]$

d

$K_{3} [Co {(CN)}_{6}]$

answer is D.

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Detailed Solution

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As ${CN}^{-}$ is a strong filed ligand. $K_{3} [Co {(CN)}_{6}]$ will have maximum ' $Δ$ '

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