Description: Practice Class 10 Chemistry Chapter 14 MCQs on Environmental Chemistry I: The Atmosphere. These important objective questions are based on FBISE exam pattern and include air pollution, greenhouse effect, ozone layer, and atmospheric gases.
1. The most abundant gas in the atmosphere is:
2. The gas essential for respiration is:
3. Which gas is mainly responsible for greenhouse effect?
4. The ozone layer protects Earth from:
5. Acid rain is mainly caused by:
and 
B)
and 
C)
and 
D)
and 6. Which layer of atmosphere contains ozone?
7. Global warming causes:
8. The percentage of oxygen in atmosphere is approximately:
9. Which gas is responsible for depletion of ozone layer?
10. Air pollution affects mainly the:
11. Which gas is used by plants during photosynthesis?
12. Smog is a mixture of smoke and:
13. Which gas contributes most to acid rain formation?
14. The normal pH of rainwater is about:
15. Which atmospheric gas helps in nitrogen fixation during lightning?
16. Greenhouse gases trap:
17. Which gas is known as laughing gas?
18. Which gas is poisonous even in small quantity?
19. The increase in Earth’s average temperature is called:
20. Which gas is released during complete combustion of fuels?
21. The harmful effect of ultraviolet radiation includes:
22. Which pollutant causes respiratory problems?
23. Ozone molecule contains how many oxygen atoms?
24. Which gas is mainly responsible for acid rain?
25. Which atmospheric layer is closest to Earth?
26. Which gas helps in combustion?
27. Which gas is called dry ice in solid form?
28. Excessive greenhouse effect may lead to:
29. The major source of air pollution is:
30. Which gas is mainly responsible for photosynthesis?
31. Which gas is released by plants during photosynthesis?
32. Which pollutant is produced by incomplete combustion?
33. The layer protecting Earth from meteors is:
34. Which atmospheric gas is chemically inactive?
35. Which gas is responsible for the foul smell of rotten eggs?
36. Which layer of atmosphere is suitable for flying airplanes?
37. Which atmospheric layer contains weather clouds?
38. Which gas is necessary for burning fuels?
39. The major greenhouse gas produced by human activities is:
40. Which environmental problem is caused by excessive use of CFCs?
41. Which gas is used in electric bulbs?
42. Which gas is mainly responsible for suffocation in closed rooms?
43. Acid rain damages:
44. Which gas is filled in weather balloons?
45. Which process naturally removes carbon dioxide from atmosphere?
46. Which gas causes irritation in eyes and throat?
47. The atmosphere acts like a:
48. Which gas is produced during volcanic eruptions?
49. Which layer of atmosphere contains most of the air mass?
50. Environmental chemistry mainly deals with: