Environmental Chemistry Model Question Paper

11th Standard

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Chemistry

Time : 02:00:00 Hrs
Total Marks : 50
    5 x 1 = 5
  1. Which of the following is natural and human disturbance in ecology?

    (a)

    Forest fire

    (b)

    Floods

    (c)

    Acid rain

    (d)

    Green house effect

  2. The pH of normal rain water is

    (a)

    6.5

    (b)

    7.5

    (c)

    5.6

    (d)

    4.6

  3. Release of oxides of nitrogen and hydrocarbons into the atmosphere by motor vehicles is prevented by using __________

    (a)

    grit chamber

    (b)

    scrubbers

    (c)

    trickling filters

    (d)

    catalytic convertors

  4. Biochemical oxygen Demand value less than 5 ppm indicates a water sample to be

    (a)

    highly polluted

    (b)

    poor in dissolved oxygen

    (c)

    rich in dissolved oxygen

    (d)

    low COD

  5. Which among the following is a green house gas?

    (a)

    H2

    (b)

    CH4

    (c)

    O3

    (d)

    All of these

  6. 4 x 1 = 4
  7. An example for biodegradable pollutant is ..............

    ()

    plant waste

  8. .............. gas is used in the process of photosynthesis.

    ()

    CO2

  9. ................. binds with hemoglobin and reduce the oxygen-carrying capacity of blood.

    ()

    CO

  10. Earth's average surface temperature would be only about ................

    ()

    -18°C

  11. 4 x 1 = 4
  12. CO

  13. (1)

    Cardiac arrest

  14. Acid rain

  15. (2)

    affect central nervous system

  16. Lead

  17. (3)

    Stone leprosy

  18. Lead in water

  19. (4)

    Kidney damage

    6 x 2 = 12
  20. Define smog.

  21. What are degradable and nondegradable pollutants?

  22. What is green chemistry?

  23. Explain how does greenhouse effect cause global warming

  24. What is green house effect?

  25. Define particulate pollutants.

  26. 5 x 3 = 15
  27. Dissolved oxygen in water is responsible for aquatic life. What processes are responsible for the reduction in dissolved oxygen in water?

  28. From where does ozone come in the photo chemical smog?

  29. Explain how oxygen deficiency is caused by carbon monoxide in our blood? Give its effect

  30. What are the various methods you suggest to protect our environment from pollution?

  31. Write about Bhopal gas tragedy.

  32. 2 x 5 = 10
  33. What are particulate pollutants? Explain any three.

  34. Differentiate the following
    (i) BOD and COD
    (ii) Viable and non-viable particulate pollutants

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