Chapter 18: Pollution of Air and Water

Q1. What is smog? How is it formed?

Solution

Smog is a mixture of smoke and fog. It forms when smoke particles combine with water vapor in the air, usually during cold weather conditions.

Q2. What are the methods of water purification?

Solution

1. Boiling
2. Chlorination
3. Filtration
4. Distillation
5. UV treatment

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