In the ring test for identification of nitrate ion, what is the formula of the compound responsible for the brown ring formed at the interface of the two liquids ?

In the ring test for identification of nitrate ion, what is the formul

1.	In the ring test for identification of nitrate ion, what is the formula of the compound responsible for the brown ring formed at the interface of the two liquids ?
Answer» SOLUTION :The formula of the compound RESPONSIBLE for brown ring in the test for IDENTIFICATION of NITRATE ION is : `[Fe(H_(2)O)_(5)NO]^(2+)SO_(4)^(-)` Pentaaquanitrosoniumiron (I) sulphate