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D and F Block Elements question

2018 · Q85
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D and F Block Elements question

2018 · Q85

NEETChemistryD and F Block ElementsMCQ+4 / −1
Which one of the following ions exhibits d-d transition and paramagnetism as well?
  1. A
    CrO42-
  2. B
    Cr2O72–
  3. C
    MnO4-
  4. D
    MnO42-
View written solutionFree

Correct answer: D

In CrO42-       Cr+6 (n = 0)       diamagnetic

In Cr2O72–       Cr+6 (n = 0)       diamagnetic

In MnO4-       Mn+7 (n = 0)       diamagnetic

In MnO42-       Mn+6 (n = 1)       paramagnetic

In MnO42-, one unpaired electron(n) is present in d-orbital so, d-d transition is possible.

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