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The complex ion which has no ""d"" elect...

The complex ion which has no `""d""` electrons in the central atom is `(at. Cr=24, Mn=25, Fe=26,Co=27)`

A

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

B

`[Co(NH_(3))_(6)]^(3+)`

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
A
`{:(overset(+7)(Mn)O_(4)^(" "-)),(Mn=(Ar)4s^(@)3d^(@)):}`
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