1.

Brown ring test is for

Answer»

`NO_(3)^(-)`
`Cl^(-)`
I
`Br^(-)`

Solution :`NO_(3)^(-)+H_(2)SO_(4) to HSO_(4)^(-) + HNO_(3)`
`6H_(2)SO_(4)+2HNO_(3)+3H_(2)SO_(4) to 3FE(SO_(4))_(3)+4H_(2)O+2NO`
`[FE(H_(2)O)_(6)]SO_(4). H_(2)O+NO to underset("Brown ring")([Fe(H_(2)O)_(5)(NO)]SO_(4))+2H_(2)O`


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