Pollution of Air and Water Worksheet-5

Pollution of Air and Water Worksheet-5

1. Which method of water purification does NOT kill microorganisms?

(a) Boiling                                      (b) Filtration

(c) Chlorination                            (d) Distillation

2. Which water pollutant is incorrectly paired with the source?

(a) Oil spill - ship                         (b) Pesticide - oil palm plantation

(c) Sewage - large factory          (d) Nitrate - farm

3. Sulphur dioxide in air:

(a) harms the skin and the lungs

(b) mixes with the blood and prevents it from carrying oxygen

(c) affects the heart and the liver

(d) makes the air temperature rise

4. Lead particles are released into the air by the burning of:

(a) coal in thermal power stations

(b) petrol in automobiles

(c) biomass in chullahs

(d) LPG for cooking

5. The ozone layer in our atmosphere protects us from the bad effects of:

(a) carbon dioxide                        (b) CFC's

(c) the sun's ultraviolet rays      (d) all of these

6. Which of the following gases is regarded as an atmospheric pollutant?

(a) O₂                  (b) O₃                 (c) SO₂               (d) N₂

7. Monuments of marble can be destroyed by:

(a) sulphur dioxide pollution     (b) carbon monoxide pollution

(c) pesticide pollution                 (d) dust particles

8. The pollutants chlorofluorocarbons are major source of air pollution contributed by:

(a) industrial effluents                (b) aerosols

(c) sewage pollutants                  (d) all of these

9. Which of these is the major air pollutant in cities like Delhi and Kolkata?

(a) Carbon monoxide

(b) Hydrocarbons

(c) Suspended particulate matter

(d) Oxides of nitrogen

10. Which of the following is NOT a general pollutant of atmosphere?

(a) CO₂               (b) SO₂               (c) SO₃               (d) NO₂

Answer Key:

(1)-(b); (2)-(c); (3)-(a); (4)-(b); (5)-(c); (6)-(c); (7)-(a); (8)-(b); (9)-(c); (10)-(a)