Question

Formation of a brown ring at a junction of two liquids in the brown ring test confirms the presence of :

• A. Nitrates
• B. Sulphides
• C. Carbonates
• D. Ammonia

Answer 1

The correct option is A

Nitrates

Formation of a brown ring at a junction of two liquids in the brown ring test confirms the presence of nitrates. This test is performed by taking the salt solution in a test tube and by adding an equal amount of freshly prepared ferrous sulphate. The test tube is held in a slant position and concentrated sulphuric acid is poured along the sides of the test tube. If a brown ring is formed then the given salt is a nitrate salt.