Class 12 NEET Chemistry Coordination Compounds

[Mn(H2O)6]2+:Mn2+=3d5.
∴ Number of unpaired electrons = 5
[Fe(H2O)6]2+:Fe2+=3d6
∴ Number of unpaired electrons = 4
[Co(H2O)6]2+:Co2+=3d7
∴ Number of unpaired electrons = 3
[Cr(H2O)6]2+:Cr2+=3d4
∴ Number of unpaired electrons = 4
Minimum paramagnetic behaviour is shown by [Co(H2O)6]2+