. Explain brown ring test with the help of a chemical equation

Best Answer

Explanation:-

• Brown ring test is a  confirmatory test for nitrate ion  in the compound.
• First the compound is dissolved  in a proper solvent then we add Ferrous sulphate solution to it. This will reduce the nitrate ions  to a more reactive nitrite ion.
• After this we add concentrated  sulphuric acid slowly In such a way that it forms a layer below the aqueous solution.
• Appearance of brown ring at the junction of two liquids indicates the presence of nitrate ion.

Final Answer:-

• Brown ring test is used to detect the presence of nitrate ion
• First the nitrate ion is reduced to more reactive nitrite ions  with the help of  ferrous sulphate solution.
• Then we add sulfuric acid to the solution and a brown ring at the junction of two liquids due to the nitrosyl complex indicates the presence of nitrate ions.