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Magnetic moment 2.84 BM is given byA. `Cr^(2+)`B. `Co^(2+)`C. `Ni^(2+)`D. `Ti^(3+)`

Answer» Correct Answer - C
`Cr^(2+)-3d^(4):4 "unpaired electron"`
`Co^(2+)-3d^(7),3:4 "unpaired electron"`
`Ni^(2+)-3d^(8):2 "unpaired electron"`
`Ti^(3+)-3d^(1):1 "unpaired electron"`
Magnetic moment `(mu)=sqrt(n(n+2))=sqrt(2(2+2))=2.86BM`
It shows that `Ni^(2+)` with 2 unpaired electrons matches the value of magnetic moment.


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