Arrange The Following In The Increasing Order Of Paramagnetism : I: [Fe(H2O)6]Cl3 II: K4[Fe(CN)6] III: K3[Fe(CN)6] IV: [Fe(H2O)6]SO4.H2O

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Question

Arrange the following in the increasing order of paramagnetism :

I: [Fe(H₂O)₆]Cl₃

II: K₄[Fe(CN)₆]

III: K₃[Fe(CN)₆]

IV: [Fe(H₂O)₆]SO₄.H₂O

easy

Solution

Correct option is

II < III < IV < I

H₂O is a weak nucleophile (ligand) and CN^– is a strong nucleophile.

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