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Air Pollution MCQs with Answers

Air pollution MCQs with answers can help students evaluate their knowledge of cause of air emissions and air quality and effects of pollution on environment. Answers are also given for air pollution multiple choice questions and answers PDF to help you remember. Try our Air pollution MCQs with answers to see if you can get all the answers right for the questions below.

Air Pollution MCQs with Answers

Atmospheric Pollution is defined as the release of all pollution substances into the atmosphere that are harmful to human health and the environment, such as gases, particles, biological molecules, and so on. 

1. Which of the following pollutants is the root cause of SMOG?

  1. From incinerators
  2. Emissions from vehicles
  3. Both incinerators and emissions from vehicles
  4. None of the above

2. Which of the following is not a primary air pollutant?

  1. PANs
  2. Ozone
  3. Carbon monoxide
  4. Nitrogen Dioxide

3. Carbon mono oxide is a pollutant because

  1. It reacts with O2
  2. It inhibits glycolysis
  3. Makes nervous system inactive
  4. Reacts with haemoglobin

4. Supersonic jets pollute the environment by thinning the atmosphere.

  1. CO2 layer
  2. SO2 layer
  3. O3 layer
  4. O2 layer

5. The truth about the ‘greenhouse effect’ is that it exists.

  1. Caused by combination of many gases
  2. Caused by CO2
  3. Caused only by CO2, CFC, CH4 and NO2 gases
  4. None of these

6. Mobile combustion accounts

  1. 10-20% of air pollution
  2. 40-50% of air pollution
  3. 50-60 % of air pollution
  4. 5-10 % of air pollution

7. Air pollution can be harmful.

  1. Natural origin
  2. Artificial or manmade origin
  3. Both a and b
  4. B only

8. Which of the following particles is referred to as a particulate polluter?

  1. Ozone
  2. Radon
  3. Fly Ash
  4. Ethylene

9. Which of the following agents is to blame for the Taj Mahal’s yellowing?

  1. Sulphur
  2. Chlorine
  3. Sulphur dioxide
  4. Nitrogen dioxide

10. What precautions should be taken to ensure survival when the ozone level is high?

  1. Drive less
  2. Stay hydrated
  3. Both A and B
  4. Go for a long walk

11. In, there is severe air pollution.

  1. Cities
  2. Industrialized areas
  3. Densely populated areas
  4. All of these

12. Particulate pollutants are

  1. Are small solid particles and liquid droplets
  2. Liquid droplets in atmosphere
  3. Are small solid particles released into the atmosphere.
  4. All of these

13. Smog causes which of the following diseases?

  1. Rickets
  2. Bronchitis
  3. Breathing Problems
  4. All of the above

14. Which of the following gases has the highest concentration in the air?

  1. Oxygen gas
  2. Nitrogen gas
  3. Water vapour
  4. Carbon dioxide gas

15. Except for one, they are all particulate pollutants.

  1. Dust
  2. Ozone
  3. Soot
  4. Smoke

16. Which of the following is an example of a secondary pollutant?

  1. CO2
  2. CO
  3. O3
  4. SO2

17. Which of the following statements about SMOG is correct?

  1. SMOG is derived from the fog
  2. SMOG is derived from smoke
  3. SMOG is derived from water vapour
  4. SMOG is derived from both fog and smoke

18. The main source of photochemical smog is________.

  1. Hydrogen peroxide
  2. Chlorofluorocarbon
  3. Peroxyacetyl nitrate
  4. All of the above

19. Smog causes which of the following diseases?

  1. Rickets
  2. Bronchitis
  3. Breathing Problems
  4. All of the above

20. Which of the following statements about the Air Quality Index is correct?

  1. It indicates the colour of the air.
  2. It predicts ozone levels in your area.
  3. It determines the intensity of sound and sound pollution.
  4. It estimates air pollution mainly sulphur content in the air.

21. Fine organic or inorganic particles suspended in air are referred to as

  1. Particulate pollutant
  2. Gaseous pollutant
  3. Aerosol
  4. None of these

22. Increased levels of air pollution cause

  1. Soil erosion
  2. Global warming
  3. Respiratory problems
  4. All of the above

Answer Key

1. Both incinerators and emissions from vehicles

2. Ozone

3. Reacts with haemoglobin

4. O3 layer

5. Caused only by CO2, CFC, CH4 and NO2 gases

6. 50-60 % of air pollution

7. Both a and b

8. Fly Ash

9. Sulphur dioxide

10. Both A and B

11. All of these

12. Are small solid particles and liquid droplets

13. All of the above

14. Nitrogen gas

15. Ozone

16. O3

17. SMOG is derived from both fog and smoke.

18. Chlorofluorocarbon

19. All of the above

20. It predicts ozone levels in your area.

21. Aerosol

22. Respiratory problems

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