Questions :-

1. The layer of air present around the earth is called ___________
(a) Smog
(b) Pollution
(c) Atmosphere
(d) None of these

2. Name the substances which contaminate the air.
(a) Air pollutant
(b) Water pollutant
(c) Land pollutant
(d) None of these

3. When air is contaminated by unwanted substances which have a harmful effect on both the living and the non-living they are called __________
(a) Water pollution
(b) Air pollution
(c) Land pollution
(d) None of these

4. Name the colourless poisonous gas which is produced from incomplete burning of fossils fuels.
(a) CO (carbon monoxide)
(b) CO2 (carbon dioxide)
(c) O2 (oxide)
(d) None of these

5. When fog is mixed with smoke then __________ is caused.
(a) CFC
(b) Smog
(c) Global warming
(d) None of these

6. Name the water which is fit for drinking.
(a) Potable water
(b) Immortal water
(c) Mortal water
(d) None of these

7. When the average temperature of the earth’s atmosphere is gradually increasing, that is called __________
(a) CFC
(b) Smog
(c) Global warming
(d) None of these

8. Name the gas released from refrigerators, air conditioner.
(a) CO (carbon monoxide)
(b) CO2 (carbon dioxide)
(c) CFC (chloro fluoro carbon)
(d) None of these

9. Which gas damage ozone layer?
(a) CFC
(b) O2
(c) Cl2
(d) CO2

10. The Taj Mahal is being affected by _________
(a) Noise pollution
(b) Land pollution
(c) Water pollution
(d) Air pollution

Chapter - 18 Pollution of Air and Water Test 1 | Class - 8th Science

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