Question

The brown ring test is used for the detection of ______.

Options

• \[\ce{CO^2-_3}\]

• Cl⁻

• \[\ce{NO^-_3}\]

• \[\ce{SO^2-_3}\]

Answer 1

The brown ring test is used for the detection of \[\ce{\mathbf{\underline{NO^-_3}}}\].

Explanation:

The brown ring test is used to detect nitrate ions \[\ce{(NO^-_3)}\]. A brown ring forms at the junction of the two liquids due to the formation of a nitrosyl complex of iron(II).