A complex of a certain metal ion has a magnetic moment of `4.90BM` Another complex of the same metal ion in the same oxidation state has zero magnetic moment The central metal ion could be which of the following (a) `Cr^(3+)` ,(b) `Mn^(3+)` (c ) `Fe^(2+)`

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`