Question:
Brown ring is made for
Brown ring is made for
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The brown ring complex is [Fe(H\(_2\)O)\(_5\)NO]SO\(_4\).
Updated On: Apr 20, 2026
- \(\mathrm{NO}_3^-\)
- \(\mathrm{Cl}^-\)
- \(\mathrm{I}^-\)
- \(\mathrm{Br}^-\)
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Brown ring test is a confirmatory test for nitrate ions.
Step 2: Detailed Explanation:
The test involves: NO\(_3^-\) + 3Fe\(^{2+}\) + 4H\(^+\) → NO + 3Fe\(^{3+}\) + 2H\(_2\)O;
Fe\(^{2+}\) + NO → [Fe(H\(_2\)O)\(_5\)NO]\(^{2+}\) (brown ring complex).
Step 3: Final Answer:
\(\mathrm{NO}_3^-\)
Brown ring test is a confirmatory test for nitrate ions.
Step 2: Detailed Explanation:
The test involves: NO\(_3^-\) + 3Fe\(^{2+}\) + 4H\(^+\) → NO + 3Fe\(^{3+}\) + 2H\(_2\)O;
Fe\(^{2+}\) + NO → [Fe(H\(_2\)O)\(_5\)NO]\(^{2+}\) (brown ring complex).
Step 3: Final Answer:
\(\mathrm{NO}_3^-\)
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