Question

The pair having the same magnetic moment is
[at. No. `Cr = 24, Mn = 25, Fe = 26 " and " Co = 27]`
A. `[MnO_(4)]^(-)`
B. `[Co(NH_(3))_(6)]^(3+)`
C. `[Fe(CN)_(6)]^(3-)`
D. `[Cr(H_(2)O)_(6)]^(3+)`

Answer 1

Correct Answer - A
In `[MnO_(4)]^(-), Mn^(7+)` has no d-electron.