The river Periyar gets pollution mainly from:

Related Mcqs:

1. The sea water gets pollution mainly due to:

   A. Industrial waste
   B. Oil spills
   C. Death of marine fauna
   D. None of these

2. The air pollution caused by phosphate fertilizer factories is due to:The air pollution caused by phosphate fertilizer factories is due to:

   A. Phosphene
   B. SiF4
   C. Dust
   D. Halogens

3. In big cities, air pollution is mainly due to:

   A. Burning of fossil fuel
   B. Thermal power plants
   C. Sewage
   D. Suspended particles

4. Pollution of SO2 destroy:

   A. Fungi
   B. Lichen
   C. Algae
   D. Fishes

5. Which of the following does not cause pollution?

   A. CO2
   B. SO2
   C. H2
   D. CO

6. Which of the following is the use of lichens in case of pollution?

   A. They treat the polluted water
   B. They act as bio-indicators of pollution
   C. They promote pollution
   D. Lichens are not related with pollution

7. The CFC pollution sources include:

   A. Jet air crafts only
   B. Fire extinguishers and jet air crafts
   C. Refrigerators and jet air crafts
   D. All of these

8. With the increase in water pollution, the BOD:

   A. Decreases
   B. Increases
   C. Remains the same
   D. Is no measure of pollution

9. Air pollution is maximum caused by:

   A. Sewage and industrial effluents
   B. Household detergents and pesticides
   C. Automobile exhausts and chemicals from industry
   D. Sewage and pesticides

10. If water pollution continues at its present rate, it will eventually:

    A. Make oxygen molecules unavailable to aquatic life
    B. Make nitrates unavailable to aquatic life
    C. Prevent precipitation
    D. Stop the water cycle