MEDIUMMCQ SINGLEJEE Mains ChemistryInorganic ChemistryCoordination compoundsValence Bond Theory
Which of the following complex ions is diamagnetic?
A.[FeF6]3–
B.[Cu(NH3)6]2+
C.[Cr(H2O)6]2+
D.[Zn(NH3)6]2+✓ Correct
Explanation
The compound [Zn(NH3)6]2+ has d10 configuration. Thus all the electrons are paired up and this means that it will be diamagnetic. The compound [FeF6]3– has due to d5 configuration. Thus all the electrons have same spin and this means that it will be paramagnetic. The compound [Cu(NH3)6]2+ has due to d9 configuration. Thus one of the electrons is unpaired and this means that it will be paramagnetic. The compound [Cr(H2O)6]2+ has due to d4 configuration. Thus four electrons are unpaired and this means that it will be paramagnetic.
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