Q.

Which one of the following ions exhibits d-d transition and paramagnetism as well?

Moderate

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By Expert Faculty of Sri Chaitanya

CrO42-

Cr2O72-

MnO4-

MnO42-

answer is D.

(Detailed Solution Below)

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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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