To a solution of an unknown compound, a little dilute tet...
To a solution of an unknown compound, a little dilute tetraoxosulphate (VI) acid was added with some freshly prepared iron (II) tetraoxosulphate (VI) solution. The brown ring observed after the addition of a stream of concentrated tetraoxosulphate (VI) acid confirmed the presence of?
CO2−3
Cl-
SO2−3
NO2−3
Correct answer is D
NO−3 is confirmed, then the brown ring is due to the formation of FESO4.NO
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