CHEMISTRY [3 Mark Question Answer]

Steps to be taken to prevent water pollution :
1. Trees and plants to be planted along the banks of rivers and canals.
2. Bathing and cleaning of animals near or in water sources be not allowed.
3. Use of pesticides, insecticides, fungicides, and fertilisers should be reduced.
4. The polluted water from industries should be treated first and then discharged into water bodies. 5. Use biodegradable detergents.
6. Water containing sewage should be passed through sewage treatment plants first and then this water should be used for irrigation.
7. Wells should be covered properly and washing and cleaning of clothes, utensils, and animals should not be done near the well to keep them clean.

Four ways to conserve water:
1. Do not allow water to drip from defective taps.
2. More dams should be built.
3. More plantation should be done as plants help in bringing rain.
4. Wastage of water should be avoided.
5. Close the tap when you are brushing your teeth. Rather use a mug. Close the tap when you are washing clothes, open the tap only when you need it. Reduce, Reuse and recycle should be our mantra

Three methods to remove germs :
1. By boiling: Boiling kills germs present in water.
2. Adding potassium permanganate: By adding potassium permanganate in the well the germs can be killed.
3. Chlorination: After filtration water is passed through chlorination tank here chlorine kills the germs.