1. Which of the following is a primary pollutant?
Answer:
Explanation:
Primary pollutants are those directly released into the atmosphere. Sulphur dioxide is a primary pollutant, while others are secondary pollutants.
2. The greenhouse effect is caused by an excess of:
Answer:
Explanation:
The greenhouse effect results from an increase in gases like carbon dioxide which trap heat in the atmosphere.
3. Which of the following is not a consequence of acid rain?
Answer:
Explanation:
Acid rain does not cause the depletion of the ozone layer. They are two separate environmental issues.
4. BOD stands for:
Answer:
Explanation:
BOD refers to the amount of oxygen required by bacteria to decompose organic matter in water.
5. Which gas is responsible for the formation of photochemical smog?
Answer:
Explanation:
Nitrogen oxides, when combined with volatile organic compounds in the presence of sunlight, lead to the formation of photochemical smog.
6. The main cause of eutrophication is:
Answer:
Explanation:
Eutrophication is caused by an excessive amount of nutrients, often due to fertilizer run-off, leading to algal blooms.
7. Ozone layer depletion is mainly caused by:
Answer:
Explanation:
CFCs are the primary culprits responsible for the depletion of the ozone layer in the stratosphere.
8. Which among the following is a non-biodegradable waste?
Answer:
Explanation:
Plastic bags are non-biodegradable and persist in the environment for a long time.
9. Which of the following is not a greenhouse gas?
Answer:
Explanation:
While water vapor, methane, and ozone are greenhouse gases, nitrogen does not contribute to the greenhouse effect.
10. Which metal is a major contaminant in the Minamata disease?
Answer:
Explanation:
Minamata disease is caused by the consumption of seafood contaminated with methylmercury.
11. The primary source of organic pollution in freshwater is:
Answer:
Explanation:
Sewage is the main source of organic pollution in freshwater systems.
12. The term "Tropospheric pollution" refers to:
Answer:
Explanation:
The troposphere is the lowest layer of the atmosphere, and its pollution refers to the contamination at ground level.
13. Which of the following pollutants can cause skin cancer in humans?
Answer:
Explanation:
Excessive exposure to UV rays can increase the risk of skin cancer.
14. CNG stands for:
Answer:
Explanation:
CNG is a cleaner alternative fuel to traditional gasoline and diesel.