1.

The brown righ test for NO_(2)^(-) and NO_(3)^(-) is due to the formation of complex ion with a formula

Answer»

`[FE(H_(2)O)_(6)]^(2+)`
`[Fe(NO)(CN)_(5)]^(2+)`
`[Fe(H_(2)O)_(5)NO]^(2+)`
`[Fe(H_(2)O)(NO)_(5)]^(2+)`

Solution :`[Fe(H_(2)O)_(5)NO]^(2+)` ION is formed


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