NPTEL Air Pollution and Control Week 1 Assignment Answers 2025
1. Match List-I (Air pollution events/accidents) with List-II (Year) and select the correct answer using the codes given below:
List I (Air pollution events/accidents) List II (Year)
A. Donora, Pennsylvania 1. 1984
B. Los Angeles smog 2. 1948
C. Bhopal Gas Tragedy 3. 1954
D. Vapour Cloud Explosion 4. 2009- A-2, B-3, C-1, D-4
- A-4, B-1, C-3, D-2
- A-4, B-3, C-2, D-4
- A-1, B-2, C-3, D-1
Answer :- a
2. Which of the following fuels was banned by King Edward-I of England in 1307?
- Wood
- Coal
- Both coal and wood
- Fossil fuel
Answer :- b
3. The lithosphere includes:
1. Crust
2. Uppermost mantle
3. Water over the earth
4. Water beneath the earth
Select the correct combination:
- 1, 2, 3
- 2, 3
- 1, 2
- 1, 4
Answer :- For Answer Click Here
4. How can chemical transformation affect air pollutants?
- By neutralizing them
- By forming secondary pollutants
- By making them harmless
- By increasing their density
Answer :-
5. What are Polycyclic Aromatic Hydrocarbons (PAHs) primarily found in?
- Water and air
- Coal and tar sediments
- Vegetation
- Natural gas
Answer :-
6. Forest fires contribute to the presence of Polycyclic Aromatic Hydrocarbons (PAHs) in the environment because they involve:
- Incomplete combustion of organic matter
- Complete combustion of trees
- Chemical reactions in the soil
- Evaporation of water vapor
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7. Which of the following is the short-term effects of dioxin on humans?
- Vomiting
- Coughing
- Dark spots and lesions on the skin
- Throat irritation
Answer :-
8. Which of the following pollutants is NOT mentioned as causing organ toxicity in animals?
- Carbon monoxide (CO)
- Nitrous oxide (N₂O)
- Ammonia (NH₃)
- Mercury
Answer :-
9. What is a major stressor to biodiversity caused by air pollution?
- Excess deposition of airborne nitrogen in the form of ammonia
- Carbon dioxide emissions
- Ozone layer depletion
- Acid rain
Answer :-
10. As a preservative coating on the building surface, materials used like acrylic copolymers and siloxanes because of their ___________film forming properties.
- Good cohesion
- Good adhesion
- Weak cohesion
- Weak adhesion
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