Environment Science (Optional First)
Group ‘A’
Answer any 18 questions from this sub-group. 18×4=72
Physical Aspect
Answer any 7 questions from this sub-group. 7×4=28
1. What is green house? What are its specific characteristics? 1+3
2. What are green house gases? Explain two of them with examples. 1+3
3. Write any two causes of greenhouse effect and its two impacts of the earth. 2+2
4. Name the different layers of atmosphere? Write down their thickness and significance. 2+2
5. What id depletion of ozone layer? Mention any three factors that are responsible for ozone layer depletion. 2+2
6. Explain in brief about the importance of energy for industrial development. 4
7. Write short notes on: 2+2
- Energy crisis
- Energy requirement in Nepal
8. What is meant by fuel? Why is wind energy called a renewable energy resource? Write its uses and advantages. 1+1+2
Chemical Aspect
Attempt any 2 questions from this sub-group.
9. Write any four different sources of hazardous wastes with three examples of each. 4
10. “There should be proper waste management system in research centres to reduce hazardous waste.” Clarify this statement with three suitable examples. 4
11. Write short notes on: 2+2
- Landfill
- Incineration
Biological Aspect
Answer any 3 questions from this sub-group.
12. List out four important points of National Park and Conservation Area. 4
13. “For the conservation of animals, control of illegal hunting and forest conservation is necessary.” Clarify it. 4
14. Mention the names of two endangered reptiles and write six major causes for disappearance of animals. 1+3
15. Give detailed information about Musk deer. Prepare your answer on the basis of its introduction, habitat, food, reproduction and life span. 4
Natural Aspect
Answer any two questions from this sub-group.
16. Describe the importance of wetland from religious and cultural view points. Give examples also. 4
17. How do wetlands provide food for human and wild animals? Give two examples of each. 2+2
18. Compare river and pond as source of wetland. 4
Socio-Economic Aspect
Answer any 2 questions from this sub-group.
19. Give introduction of agriculture system in Nepal. 4
20. Compare and contrast the use of technology in agriculture. 2+2
21. List out four proper ways to apply pesticides on agriculture. 4
Health and Sanitation Aspect
Attempt any two questions from this sub-group.
22. “Health is directly related to healthy environment.” Explain. 4
23. Make a list of four health hazards caused due to air pollution and also suggest ways of prevention. 4
24. Mention four safety measures for the workers working in an unsafe industrial area. Also write two effects caused due to carelessness. 2+2
Group ‘B’
Write long answers of any four questions from this group. 4×7=28
25. Describe any five effects of ozone depletion. Explain two ways for its conservation. 5+2
26. Describe three main preventive measures of hazardous wastes and mention two measures to save life. 6+1
27. Explain three causes of extinction of wildlife. Also write the ways of protection of wildlife and describe any two of them. 4+3
28. “Destruction of wetland may cause adverse effect on environment.” Give your views with examples. Mention three policies undertaken for wetland conservation. 4+3
29. How does irrigation of land help in crop growth? Give answer in four points. Describe the importance of agriculture for poultry farming. 4+3
30. How could control of sound pollution reduce environment pollution? Why are clean air and safe drinking water necessary? 4+3
