Which of the following have maximum number of unpaired electrons
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a
Co3+
b
Fe2+
c
Co2+
d
Fe3+
answer is D.
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Detailed Solution
Co3+→Ar3d64s0, number of unpaired electrons= 4Fe2+→Ar3d64s0, number of unpaired electrons= 4Co2+→Ar3d74s0, number of unpaired electrons= 3Fe3+→Ar3d54s0, number of unpaired electrons= 5