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Class 12 Biology: Environmental Issues
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MCQs on air and water pollution and its control, biomagnification, eutrophication, solid wastes, agro chemicals and its effects, radioactive wastes, greenhouse effect, global warming, stratosphere ozone depletion and deforestation.

Class 12 Biology: Environmental Issues
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25 Questions

1. Which naturally occurring phenomenon is responsible for heating of Earth's surface and atmosphere?
2. In which part of the atmosphere is the good ozone found?
3. What is the process of removal of forest cover of an area called?
4. When did the Government of India pass the Environment Protection Act?
5. What is a small glasshouse used for growing plants especially during winter called?
6. What should be the amount of BOD in the drinking water?
7. Why is CNG (Compressed Natural Gas) preferred over petrol?
8. What are wastes from homes, hospitals, offices, schools, stores, etc., that are collected and disposed of by the municipality called?
9. In which of the following process the farmers cut down the trees of the forest and burn the plant remains?
10. Which materials are hard to remove from the polluted water?
11. How much amount of dissolved oxygen does gravely polluted water consists of?
12. From which phenomenon is the term 'Greenhouse effect' derived?
13. When do the planktonic algae utilize oxygen?
14. What happens when the maximum amount of oxygen in the upstream of sewage discharge is utilized by microbes?
15. Which of the following waste can be put into deep pits in the ground and be left for the natural breakdown?
16. What is the reason for choking of the surface off any pond or lake?
17. Which of the following problem occurs due to the use of nuclear energy?
18. Which of the following are the dissolved materials present in domestic sewage?
19. What is the farming called in which there is less use of chemicals and lesser production of waste?
20. What is done in integrated organic farming?
21. What is every material that goes to trash known as?
22. Which sewage contains biodegradable waste such as organic matter?
23. What is the impact of air pollution on plants?
24. Which award is given to the individuals or communities from rural areas that have shown a significant contribution and dedication in the protection of wildlife in the Country?
25. Which of the following is a primary treatment for water pollution?

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