Air Pollution MCQs
Air Pollution MCQs Class 8
Class: CBSE Class 8
Subject: Science
Section: 18 – Pollution of Air and Water
Topic: Air Pollution MCQs
Subject: Science
Section: 18 – Pollution of Air and Water
Topic: Air Pollution MCQs
Strictly Based on NCERT Syllabus | Ideal for CBSE Board Examinations
1. Air pollution is caused by the presence of:
Answer: B. Harmful substances
Explanation: Smoke, dust, and toxic gases make air polluted and harmful.
Explanation: Smoke, dust, and toxic gases make air polluted and harmful.
2. Major source of air pollution in cities:
Answer: B. Vehicles
Explanation: Exhaust gases like CO₂, CO, NOx pollute air.
Explanation: Exhaust gases like CO₂, CO, NOx pollute air.
3. Smog is formed by:
Answer: A. Smoke + Fog
Explanation: Smog reduces visibility and harms lungs.
Explanation: Smog reduces visibility and harms lungs.
4. Gas causing acid rain:
Answer: B. Sulphur dioxide
Explanation: SO₂ forms sulphuric acid in rainwater.
Explanation: SO₂ forms sulphuric acid in rainwater.
5. Ozone layer protects Earth from:
Answer: B. UV rays
6. CFCs cause:
Answer: B. Ozone depletion
7. Greenhouse gas:
Answer: A. CO₂
8. Indoor pollution source:
Answer: B. Smoke
9. Air pollution affects:
Answer: D. All
10. Clean fuel:
Answer: C. CNG
11. Global warming leads to:
Answer: B. Ice melting
12. Air pollutant from factories:
Answer: A. Smoke
13. Respiratory disease caused by pollution:
Answer: A. Asthma
14. Planting trees helps:
Answer: B. Reduce pollution
15. Pure air contains most:
Answer: B. Nitrogen
16. Polluted air visibility reduces due to:
Answer: B. Smog
17. Noise pollution affects:
Answer: A. Hearing
18. Fossil fuel burning releases:
Answer: A. CO₂
19. Air pollution control method:
Answer: D. All
20. Air pollution mainly harms:
Answer: D. All living beings
Explanation: Polluted air impacts ecosystems widely.
Explanation: Polluted air impacts ecosystems widely.
