UPSEE Solved Model Paper 3

Magnetic moment α number of unpaired electrons
Number of unpaired electrons in the below species are
(I) [Fe(CN)6]4− = 0;
(II) [Fe(CN)6]3− = 1;
(III) [Cr(NH)6]3+ = 3;
(IV) [Ni(H2O)6]2+ = 2
Hence, the correct order is I < II < IV < III