Among the following which one has the highest paramagnetism? a) [Cr(H2O)6]3+ b) [Fe(H2O)6]2+ c) [Cu(H2O)6]2+ d) [Zn(H2O)6]2+

Larger the number of unpaired electrons, the more paramagnetism it has. The correct option is [Fe(H2O)6]2+

Paramagnetic character ∝ Number of unpaired electrons. So, in this paramagnetic character is maximum in [Fe(H2O)6]2+

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