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?
- CO\(^{2-}_{3}\)
- Cl-
- SO\(_{3}^{2-}\)
-
NO\(^{2-}_{3}\)
The correct answer is: D
Explanation
NO\(_{3}^{-}\) is confirmed, then the brown ring is due to the formation of FESO\(_4\).NO
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