The brown ring complex compound of iron is formulated as `[Fe (H_(2)O)_(5) (NO)] SO_(4)`. The oxidation state of iron is

Answer

1

Explanation

The O.N. of Fe in `[overset(x)(Fe)oversetO((H_2O))overset(+1)(NO)]^(2+)SO_4^(2-)` is x+0=+2 or x=+1