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NEET2018ChemistryCoordination CompoundsActual

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

Options

  1. AMnO 4 -
  2. BCr 2 O 7 2 -
  3. CCrO 4 2 -
  4. DMnO 4 2 -

Correct answer

D. MnO 4 2 -

Step-by-step solution

CrO 4 - 2 Cr + 6 diamagnetic Cr 2 O 7 - 2 Cr + 6 diamagnetic MnO 4 - Mn + 7 diamagnetic MnO 4 - 2 Mn + 6 Paramagnetic Unpaired electron is present so d-d transition is possible.

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