Which of the following gas can cause ACID rain?

Options

A. `SO_(2)`
B. `NO_(2)`
C. `CO_(2)`
D. All of these

Answer

To determine which gases can cause acid rain, we need to analyze each option provided in the question.

### Step-by-Step Solution:

1. **Identify the Gases**: The gases listed in the question are:
- A) SO2 (Sulfur Dioxide)
- B) NO2 (Nitrogen Dioxide)
- C) CO2 (Carbon Dioxide)
- D) All of these

2. **Understanding Acid Rain**: Acid rain is formed when certain gases in the atmosphere react with water vapor and other compounds, leading to the formation of acidic solutions that fall as precipitation.

3. **Analyze SO2**:
- Sulfur Dioxide (SO2) is known to react with water in the atmosphere to form sulfuric acid (H2SO4). This reaction contributes significantly to acid rain.
- Reaction: SO2 + H2O → H2SO4

4. **Analyze NO2**:
- Nitrogen Dioxide (NO2) can also react with water to form nitric acid (HNO3), another contributor to acid rain.
- Reaction: 3 NO2 + H2O → 2 HNO3 + NO

5. **Analyze CO2**:
- Carbon Dioxide (CO2) can dissolve in water to form carbonic acid (H2CO3), which can lower the pH of rainwater, contributing to acid rain.
- Reaction: CO2 + H2O ⇌ H2CO3

6. **Conclusion**:
- All three gases (SO2, NO2, and CO2) can lead to the formation of acids when they react with water in the atmosphere. Therefore, they all contribute to acid rain.
- The correct answer is D) All of these.

### Final Answer:
The gas that can cause acid rain is **D) All of these** (SO2, NO2, and CO2).

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