STANDARDChemistry-Coordination Compounds
STANDARD Chemistry Electronic Configuration MCQ Question
Type: MCQ-conceptual-Medium-Class 12
The complex ion which has no d-electrons in the central metal atom is
A
[MnO₄]⁻
B
[Co(NH₃)₆]³⁺
C
[Fe(CN)₆]³⁻
D
[Cr(H₂O)₆]³⁺
Correct Answer
Option A
Detailed Explanation
Oxidation state of Mn in [MnO₄]⁻ is +7, hence it does not have any d-electron present in it. Mn⁷⁺ (Z = 25) : Ar 4s⁰ 3d⁰
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