A brown ring is formed in the ring test for NO3– ion. It is due to t – InterviewSolution

1.	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
Answer» (i) [Fe(H₂O)₅(NO)]²⁺

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