What is the chemical formula of the brown ring complex formed during the nitrate test?

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 for nitrates produces a complex with the formula FeSO4.NO, where nitric oxide (NO) binds to ferrous sulfate, forming the characteristic brown ring.

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