The acid rain contains

Options

A. `H_(2)SO_(4)`
B. `HNO_(3)`
C. `H_(2)SO_(3)`
D. All of these

Answer

### Step-by-Step Solution:

1. **Understanding Acid Rain**:
- Acid rain is defined as precipitation that has a pH of 5.2 or lower. It is also referred to as acid precipitation or acid deposition.

2. **Sources of Acid Rain**:
- The primary components that lead to acid rain are sulfur dioxide (SO₂) and nitrogen oxides (NOₓ), which are emitted from human activities, particularly the combustion of fossil fuels.

3. **Formation of Acids**:
- When sulfur dioxide (SO₂) is released into the atmosphere, it can react with oxygen (O₂) to form sulfur trioxide (SO₃).
- Sulfur trioxide then reacts with water (H₂O) in the atmosphere to form sulfuric acid (H₂SO₄).
- Similarly, nitrogen monoxide (NO) can react with oxygen to form nitrogen dioxide (NO₂), which can further react with water to form nitric acid (HNO₃).

4. **Components of Acid Rain**:
- The main acids present in acid rain are sulfuric acid (H₂SO₄) and nitric acid (HNO₃).
- While sulfurous acid (H₂SO₃) can be formed from sulfur dioxide, it is not a major component of acid rain.

5. **Conclusion**:
- Based on the analysis, acid rain contains H₂SO₄ (sulfuric acid) and HNO₃ (nitric acid). Therefore, the correct answer to the question is that acid rain contains both H₂SO₄ and HNO₃.

### Final Answer:
Acid rain contains H₂SO₄ and HNO₃.

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