Question

The brown ring test is performed for the qualitative detection of________.

• A. bromides
• B. iodides
• C. nitrates
• D. phosphates

Answer 1

Answer: (C)

nitrates

Option (C) is correct.
The brown ring test is performed for the qualitative detection of nitrates.
The brown ring test is performed byputting iron(II) sulphate to a solution that contains nitrate ions. After that, slowly and carefully add concentrated sulphuric acid without disturbing the solution so that a sulphuric acid layer is formed under the aqueous solution. If nitrate is present, a brown ring consisting of $\left[Fe\right(H_{2}O{)}_{5}NO]S{O}_4$ will form at the junction of the two layers.