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Question: The complex ion which has no d – electrons in the central...

The complex ion which has no d – electrons in the central

A

[MnO4]−\lbrack MnO_{4}\rbrack^{-}

B

[Co(NH3)6]3+\lbrack Co(NH_{3})_{6}\rbrack^{3 +}

C

[Fe(CN)6]3−\lbrack Fe(CN)_{6}\rbrack^{3 -}

D

[Cr(H2O)6]3+\lbrack Cr(H_{2}O)_{6}\rbrack^{3 +}

Answer

[MnO4]−\lbrack MnO_{4}\rbrack^{-}

Explanation

Solution

Oxidations state of Mn in [MnO4]−\lbrack MnO_{4}\rbrack^{-}= +7, hence it does not have any d-electron present in it.

Mn7+Mn^{7 +} (Z = 25) : [Ar]4s03d0\lbrack Ar\rbrack 4s^{0}3d^{0}