Which statement is not true with respect to the nitrate ion test?
- A$A$. $A$ dark brown ring is formed at the junction of two solutions.
- B$B$. The ring is formed due to a nitroferrous sulphate complex.
- C$C$. The brown complex is $[Fe(H_2O)_5(NO)]SO_4$.
- D$D$. Heating the nitrate salt with conc. $H_2SO_4$,light brown fumes are evolved.
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