Q.
Which one of the following ions exhibits d-d transition and paramagnetism as well?
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a
CrO42-
b
Cr2O72-
c
MnO4-
d
MnO42-
answer is D.
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Detailed Solution
In CrO42-Cr+6(n=0) diamagnetic In Cr2O72-Cr+6(n=0) diamagnetic InMnO4-Mn+7(n=0) diamagnetic In MnO42- Mn+6(n=1) paramagnetic In MnO42- ,oneunpairedelectron (n) ispresentin d -orbital so, d - d transitionispossible.
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