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12th Standard Bio-Zoology English Medium Environmental Issues Reduced Syllabus Important Questions 2021

12th Standard

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Biology

Time : 01:00:00 Hrs
Total Marks : 100

    Multiple Choice Questions

    15 x 1 = 15
  1. With which of the following, the Agenda 21’ of Rio Summit, 1992 is related to?

    (a)

    Sustainable development

    (b)

    Combating the consequences of population

    (c)

    Mitigation norms of Green House Gases (GHGs) emission

    (d)

    Technology transfer mechanism to developing countries for ‘clean-energy’ production

  2. Which among the following awards instituted by the Government of India for individuals or communities from rural areas that have shown extraordinary courage and dedication in protecting Wildlife?

    (a)

    Indira Gandhi Paryavaran Puraskar

    (b)

    Medini Puruskar Yojana

    (c)

    Amrita Devi Bishnoi Award

    (d)

    Pitambar Pant National Award

  3. Which among the following always decreases in a Food chain across tropic levels?

    (a)

    Number

    (b)

    Accumulated chemicals

    (c)

    Energy

    (d)

    Force

  4. In the E- waste generated by the Mobile Phones, which among the following metal is most abundant?

    (a)

    Copper

    (b)

    Silver

    (c)

    Palladium

    (d)

    Gold

  5. Oil spills can lead to ________________

    (a)

    increase of BOD

    (b)

    decrease of BOD

    (c)

    No change in BOD

    (d)

    None of the above

  6. ____________ is not a green house gas.

    (a)

    CO2

    (b)

    Methane

    (c)

    PAN

    (d)

    Nitrous oxide

  7. PCB is a major component of ______________

    (a)

    e-waste

    (b)

    Agro waste

    (c)

    sewage

    (d)

    Plastics

  8. Increase in the concentration of the toxicant at successive trophic levels is known as

    (a)

    Biodeterioration

    (b)

    Biotransformation

    (c)

    Biogeochemical cycling

    (d)

    Biomagnifications

  9. A river with an inflow of domestic sewage rich in organic waste may result in:

    (a)

    Drying of the river very soon due to algal bloom

    (b)

    Increased population of aquatic food web organisms

    (c)

    An increased production of fish due to biodegradable nutrients

    (d)

    Death of fish due to lack of oxygen

  10. __________are the major causes of CO polution in large cities and towns.

    (a)

    Fossil fuels

    (b)

    Ocean

    (c)

    Deforestation

    (d)

    Automobiles

  11. Which is not a method of disposal of radioactive waste.

    (a)

    Dilute and dispense

    (b)

    Delay and decay

    (c)

    Recycle and reuse

    (d)

    Limit generation

  12. Identify the correct statement indicating 4Rs of treating water.

    (a)

    Regenerate, Reduce, Reuse and Recycle

    (b)

    Refuse, Reduce, Rejenuvate and Reuse

    (c)

    Redeem, Refuse, Rejenuvate and Reduce

    (d)

    Refuse, Reduce, Rescue and Recycle.

  13. BOD stands for_______

    (a)

    Biological Oxidation Demand

    (b)

    Biotic Oxygen Deficient

    (c)

    Biological Oxygen Deficit

    (d)

    Biochemical Oxidation Deficit

  14. Stratosphere is mainly depleted by_________

    (a)

    Excess CO

    (b)

    CFC's

    (c)

    Ozone

    (d)

    Excess CO2

  15. Statement (1): The intensity of noise is measured in dobson (dB) unit.
    Statement (2): Noise provides immense bliss.

    (a)

    Statement 1 is true, statement 2 is false

    (b)

    Statement 1 is false, statement 2 is true

    (c)

    Both Statements 1 and 2 are tru

    (d)

    Both statements 1 and 2 are false

  16. 2 Marks

    10 x 2 = 20
  17. What is SMOG and how it is harmful for us?

  18. Write notes on the following:
    a. Eutrophication
    b. Algal Bloom

  19. What is AQI?

  20. What is Ozone?

  21. How ozone hole is developed?

  22. List out the green house gases. (Any four)

  23. Define the term eutrophication.

  24. Expand RZWT and DEWATS.

  25. What are medical wastes?

  26. Define deforestation.

  27. 3 Marks

    10 x 3 = 30
  28. Why does ozone hole form over Antarctica?

  29. Mention the causes of enhanced use of ultraviolet radiation

  30. Discuss the role of an individual to reduce environmental pollution.

  31. Name the main sources of air pollution.

  32. What is global warming?

  33. What is acid rain?

  34. What are ozone depleting substances?

  35. What is Chipko movement?

  36. Explain the three main sources of water pollution

  37. What are,geological repositories?

  38. 5 Marks

    7 x 5 = 35
  39. How does recycling help reduce pollution?

  40. What are some solutions to toxic dumping in our oceans?

  41. How does forest conservation help to reduce air pollution?

  42. List the effects of air pollution.

  43. How can noise pollution be controlled?

  44. Categorize the soild waste and their sources.

  45. Recently E-Waste and plastic wastes have created dangerous effects in the environment. In order to protect the environment what will be the solution?

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