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Which of the following complex ions has ...

Which of the following complex ions has no 'd' electron(s) in the central metal atom -

A

`[Cr(H_(2)O)_(6)]^(3+)`

B

`[Co(NH_(3))_(5)Cl]^(2+)`

C

`[Fe(CN)_(6)]^(3-)`

D

`[MnO_(4)]^(-)`

Text Solution

Verified by Experts

The correct Answer is:
d
Oxidation number of `Mn` in `[MnO_(4)]^(-)` ion is `+7`. In `Mn^(7+)([Ar]3d^(0)4s^(0))` ion there are no d - electrons.
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