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in Chemistry by (121k points)
A brown ring is formed in the ring test for `NO_(3)^(-)` ion. It is due to the formation of
A. `[Fe(H_(2)O)_(5)(NO)]^(2+)`
B. `FeSO_(4). NO_(2)`
C. `[Fe(H_(2)O)_(5)(NO)_(2)]^(+)`
D. `FeSO_(4).HNO_(3)`

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