A brown ring is formed in the ring test for NO3- ion. It is due to the formation of (i) [Fe(H2O)5(NO)]2+ (ii) FeSO4 .NO2 (iii) [Fe(H2O)4(NO)2]2+ (iv) FeSO4.HNO3

This is a multiple choice answer as classified in NCERT Exemplar Correct option is (i) The 'Brown Ring Test' is an identification and conformation test of the nitrate ion (NO3- ) using conc. H2SO4 and newly produced FeSO4. Place the NO3- containing sample in a test tube. Then, with gentle shaking, add conc H2SO4 dropwise, heat it briefly on a Bunsen burner, and add freshly made greenish FeSO4 Then, due to the creation of brown coloured [Fe (H2O)5 (NO)]SO4 complex, a brown ring forms in that test tube.

A brown ring is formed in the ring test for NO₃^- ion. It is due to the formation of

(i) [Fe(H₂O)₅(NO)]²⁺

(ii) FeSO₄ .NO₂

(iii) [Fe(H₂O)₄(NO)₂]²⁺

(iv) FeSO₄.HNO₃

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Payal Gupta | Contributor-Level 10

9 months ago

This is a multiple choice answer as classified in NCERT Exemplar

Correct option is (i)

The 'Brown Ring Test' is an identification and conformation test of the nitrate ion (NO₃^- ) using conc. H₂SO₄ and newly produced FeSO₄. Place the NO₃^- containing sample in a test tube. Then, with gentle shaking, a