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Question
Arrange following complex ions in increasing order of crystal field splitting energy (∆O):
\[\ce{[Cr(Cl)6]^{3-}, [Cr(CN)6]^{3-}, [Cr(NH3)6]^{3+}}\].
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Solution
Crystal field splitting energy increases in the order:
[Cr(Cl)6]3– < [Cr(NH3)6]3+ < [Cr(CN)6]3−
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