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The correct order of the increasing magn...

The correct order of the increasing magnetic moments for the following ions is
`NiCl_(4) ^(2-) , Fe (H_(2) O ) _(6) ^(2+) , Ni (CN) _(4) ^(2-) , cu (H_(2)O) _(6) ^(2+)`

A

`Ni (CN) _(4) ^(2-) lt Cu (H _(2)O) _(6) ^(2+) ltNiCl _(4) ^(2-) lt Fe (H_(2)O) _(6) ^(2+)`

B

`NiCl_(4) ^(2-) lt Ni (Cn)_(4) ^(2-) lt Fe (H_(2) O) _(6) ^(2+) lt Cu (H_(2)O) _(6) ^(2+)`

C

`Ni (Cn) _(4) ^(2-) lt Ni Cl_(4) ^(2-) lt cu (H_(2)O) _(6) ^(2+) lt Fe (H_(2)O) _(6) ^(2+)`

D

`Ni (Cn) _(4 )^(2-) lt Cu (H_(2)O) _(6) ^(2+) lt Fe (H_(2)O) _(6) lt NiCl_(4) ^(2-)`

Text Solution

Verified by Experts

The correct Answer is:
A
Given,
`NiCl _(4) ^(2-) , Fe (H_(2) O)_(6) ^(2+) , Ni (CN _(4)) ^(2-) , Cu (H_(2)O ) _(6) ^(2+)`
`NiCl _(4) ^(2+)` - Paramagnetic
`Fe (H_(2)O) _(6) ^(2+)-` Strongly Paramagnetic
`Ni (CN_(4))^(2-) -` Low magnetic moment and is Paramagnetic
`Cu(H_(2)O ) _(6) ^(2+)-` Paramagnetic by less than` NiCl _(4) ^(2-)`
`therefore Ni (CN_(4)) ^(2-) lt Cu (H _(2)O ) _(6) ^(2+) lt Ni Cl _(4) ^(2-) lt Fe (H _(2)O ) _(6) ^(2+)`
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