Sodium carbonate extract is acidified with `HNO_(3)` only in the identification of halides. Comment.

Explanation

To understand why sodium carbonate extract is acidified with nitric acid (HNO₃) only in the identification of halides, let's break down the reasoning step by step:

### Step-by-Step Solution:

1. **Understanding the Context**:
- Sodium carbonate (Na₂CO₃) is used to extract halides from a sample. Halides include chloride (Cl⁻), bromide (Br⁻), and iodide (I⁻) ions.

2. **Purpose of Acidification**:
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