Why conc. `H_2SO_4` is stored in air tight bottles ?

Explanation

To answer the question of why concentrated H₂SO₄ is stored in airtight bottles, we can break down the explanation into several steps:

### Step-by-Step Solution:

1. **Understanding Concentrated H₂SO₄**:
- Concentrated sulfuric acid (H₂SO₄) is a strong acid that is used in various chemical processes.

2. **Hygroscopic Nature**:
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