In the ring test for `NO_(3)^(-)` ion, what is the chemical formula of the brown coloured ring ?

The brown ring test for the NO_(3)^(-) ions is due to the formation of :

The brown ring test for the NO_(3)^(-) ions is due to the formation of :

Brown ring test is for

In the ring test for identification of nitrate ion, what is the formula of the compound responsible for the brown ring formed at the interface of two liquids ?

In the brown ring test (for identification of NO_3 ). Write the formula of the brown compound?

The brown ring test for NO_(3)^(-) is due to the formation of the complex ion with formula: