Acid rain is secondary effect of

Options

A. Sound pollution
B. Air pollution
C. soil pollution
D. Water pollution

Answer

**Step-by-Step Solution:**

1. **Understanding Acid Rain**: Acid rain refers to any form of precipitation (rain, snow, sleet, or hail) that has a higher acidity than normal due to the presence of sulfuric and nitric acids.

2. **Identifying the Causes**: The primary causes of acid rain are pollutants in the atmosphere, particularly sulfur dioxide (SO₂) and nitrogen oxides (NOx). These gases are released into the air through various human activities, such as burning fossil fuels, industrial processes, and vehicle emissions.

3. **Linking to Air Pollution**: Since sulfur dioxide and nitrogen oxides are released into the atmosphere, they contribute to air pollution. When these gases react with water vapor, oxygen, and other chemicals in the atmosphere, they form sulfuric and nitric acids.

4. **Understanding the Secondary Effect**: Acid rain is considered a secondary effect because it results from the primary pollutants (sulfur dioxide and nitrogen oxides) that originate from air pollution. Therefore, the presence of these pollutants in the air leads to the formation of acid rain.

5. **Conclusion**: Based on the analysis, the correct answer to the question "Acid rain is a secondary effect of" is **air pollution** (Option B).

---