Pollution of Air and Water Worksheet-6

Pollution of Air and Water Worksheet-6

1. Catalytic converters are used in:

(a) automobiles                            (b) wind mills

(c) poultry farms                          (d) dairy farms

2. Smog is a combination of:

(a) fire and water                         (b) smoke and fog

(c) water and smoke                    (d) air and water

3. Carbon monoxide emitted by automobiles prevents oxygen transport to body tissues by:

(a) changing O₂ to CO₂

(b) destroying haemoglobin

(c) forming a stable compound with haemoglobin

(d) obstructing the reaction of oxygen with haemoglobin

4. If there was no CO₂ in the atmosphere, the earth's temperature would be:

(a) less than the present

(b) same as present

(c) higher than the present

(d) dependent on O₂ content of air

5. One of the causes of water pollution is that the farmers use excessive:

(a) manure and water                 (b) fertilizers and pesticides

(c) fertilizers and seeds               (d) pesticides and seeds

6. Which of the following is NOT a feature of potable water?

(a) It must be clean, colourless and odourless

(b) It must be free from bacteria

(c) It must have excessive sodium, calcium and magnesium as they give special taste

(d) It must contain dissolved oxygen and carbon dioxide

7. Which of the following pollutants is NOT present in the vehicular exhaust emissions?

(a) Lead                                          (b) Ammonia

(c) Carbon monoxide                  (d) Particulate matter

8. What is not the main source of water pollution in India?

(a) Discharge of untreated sewage

(b) Bathing

(c) Discharge of industrial waste

(d) All of these

9. What is the source of sulphur dioxide emissions?

(a) Agricultural farms

(b) Petroleum refineries

(c) Hydroelectric power stations

(d) None of these

10. Which of the following steps must be adopted by us to contribute towards better waste management?

(a) Reduce the amount of waste formed

(b) Reuse the waste

(c) Recycle the waste

(d) All of these

Answer Key:

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