The gas that gives brown colouration in brown ring test is

Chemistry

JAMB 2002

A. NO
B. CO₂
C. NO₂
D. CO

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Correct Answer: Option A

Explanation

In the brown ring test, nitric oxide (NO) is produced when acidified iron (II) sulphate reacts with dilute nitric acid. The nitric oxide then reacts with iron (II) to form a complex ion, which creates a brown ring at the junction of the two liquids.

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The gas that gives brown colouration in brown ring test is

Correct Answer: Option A

Explanation

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