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Question
The complex ion which has no ‘d’ electrons in the central metal atom is ______.
Options
\[\ce{[MnO^{-}_4]}\]
[Co(NH3)6]3+
[Fe(CN)6]3−
[Cr(H2O)6]3+
MCQ
Fill in the Blanks
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Solution
The complex ion which has no ‘d’ electrons in the central metal atom is \[\ce{\mathbf{\underline{[MnO^{-}_4]}}}\].
Explanation:
The complex ion \[\ce{[MnO^{-}_4]}\] has manganese in the +7 oxidation state, where it has no d-electrons. This occurs because manganese in this state has an electron configuration of [Ar]3d04s0, meaning all the d-electrons are absent, making it d-electron deficient.
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