1.

In the following salts the highest value of magnetic moment is observed in

Answer»

`MnSO_(4).4H_(2)O`
`CuSO_(4).5H_(2)O`
`FeSO_(4).6H_(2)O`
`ZnSO_(4).7H_(2)O`

SOLUTION :`Mn^(2+)=3d^(5)` i.e.No. of unpaired `e^(-)=5`
`Cu^(2+)=3d^(9)` i.e. no of unpaired `e^(-)=1`
`Fe^(2+)=3d^(6)` i.e. no of unpaired `e^(-)=4`
`Zn^(2+)=3d^(10)` i.e. no of unpaired `e^(-)=0`
`Ni^(2+)=3d^(8)` i.e., no. of unpaired `e^(-)=3`
HIgher the number of unpaired electrons higher will be the magnetic moment. hence `Mn^(2+)` having maximum unpaired electrons will have the maximum magnetic moment.


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