A complex of certain metal has the magnetic moment of 4.91 BM whereas another complex of the same metal with same oxidation state has zero magnetic moment. The metal ion could be :

Options

A. `Co^(2+)`
B. `Mn^(2+)`
C. `Fe^(2+)`
D. `Fe^(3+)`

Answer

C

Explanation

`[overset(II)(Fe)(H_(2)O)_(6)]^(2-) n=4 and mu=4.91`
`[overset(II)(Fe)(CN)_(6)]^(4-) n=0 and mu=0`