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Nitrate is confirmed by ring test. The ...

Nitrate is confirmed by ring test. The brown colour of the ring is due to formation of

A

Ferrous nitrite

B

`FeSO_(4).NO`

C

`FeSO_(4).NO_(2)`

D

Ferrous nitrate

Text Solution

Verified by Experts

The correct Answer is:
B
When `NO_(3)^(-)` is passed through `FeSO_(4)` (neutral) and then few drops of conc. `H_(2)SO_(4)` is added then the brown ring is obtain.
`FeSO_(4) + NO to underset("Nitroso Ferroussulphate")underset("(Brown ring)")(Fe(NO)SO_(4))`
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