Which compound reacts with FeSO4 to produce a brown ring?

Group VA and VIA Elements MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Group VA and VIA Elementschemistry-mcqs › group-va-and-via-elements
Published
18 Mar 2019
Last updated
28 May 2026

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Explanation

The brown ring test is a classic qualitative test for nitrates, where FeSO4 reacts with nitric oxide (NO) to form a brown ring complex. Other nitrogen oxides such as N2O3, NO2, and N2O do not produce this characteristic brown ring.

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