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 gas can cause acid rain, we need to identify the gases that contribute to the formation of acid rain. Acid rain primarily results from the reaction of water with certain pollutants in the atmosphere, particularly sulfur dioxide (SO₂) and nitrogen oxides (NOₓ).

### Step-by-Step Solution:

1. **Understanding Acid Rain**: Acid rain is formed when sulfur dioxide (SO₂) and nitrogen oxides (NOₓ) react with water vapor in the atmosphere. This results in the formation of sulfuric acid (H₂SO₄) and nitric acid (HNO₃), which then fall to the ground as acid rain.

2. **Identifying the Gases**: The main gases that lead to acid rain are:
- **Sulfur Dioxide (SO₂)**: This gas is produced from the burning of fossil fuels and industrial processes. When it reacts with water, it forms sulfurous acid (H₂SO₃), which can further oxidize to form sulfuric acid (H₂SO₄).
- **Nitrogen Oxides (NOₓ)**: These gases are produced from vehicle emissions and industrial activities. They react with water to form nitric acid (HNO₃).

3. **Conclusion**: Among the common gases, sulfur dioxide (SO₂) and nitrogen oxides (NOₓ) are the primary contributors to acid rain. If the question provides options, look for these gases.

4. **Final Answer**: The gases that can cause acid rain are sulfur dioxide (SO₂) and nitrogen oxides (NOₓ).