Derive the geometry of the complex compound corresponding to the brown ring in nitrate test Predict the magnetic moment of the complex .

Explanation

Brown ring formed in the nitrate test is due the formation of the complex ion `[Fe(H_(2)O)_(5)(NO)]^(2+)` in which Fe and NO both are present as `Fe^(o+)` and `NO^(o+)` (nitrosonium) ions respectively `Fe^(o+)` ion acts as the central metal ion and
.