Which acidic radical of dil. `H_(2)SO_(4)` group gives brown ring test?

Explanation

To determine which acidic radical of dilute `H₂SO₄` group gives the brown ring test, we can follow these steps:

### Step 1: Understand the Brown Ring Test
The brown ring test is a qualitative analysis test used to detect the presence of nitrate ions (NO₃⁻) in a solution. It involves the reaction of nitrate ions with iron (Fe²⁺) ions in the presence of sulfuric acid.

**Hint:** Remember that the brown ring test specifically identifies nitrate ions.

### Step 2: Identify the Reaction with Dilute H₂SO₄
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