Fri. Jan 10th, 2025

Global Warming and Change in Atmospheric Chemistry

  1. Which of the following gases can cause depletion of ozone layer?

    Options:
    1. Oxygen
    2. Carbon dioxide
    3. Chlorofluorocarbons (CFCs)
    4. Nitrogen

    Option: C

  2. What would happen if the depletion of ozone layer is not checked?

    Options:
    1. Increase in ultraviolet solar radiation reaching the earth’s surface
    2. Decrease in ultraviolet solar radiation reaching the earth’s surface
    3. Increase in oxygen levels in the atmosphere
    4. Decrease in nitrogen levels in the atmosphere

    Option: A

  3. How would the increased ultraviolet radiation affect plant and animal communities?

    Options:
    1. It would have no effect on them
    2. It would improve their growth and yield
    3. It would reduce their photosynthesis, water use efficiency and yield
    4. It would increase their photosynthesis, water use efficiency and yield

    Option: C

  4. How would the depletion of ozone layer affect soil moisture and food production?

    Options:
    1. Soil moisture would increase and food production would improve
    2. Soil moisture would decrease and food production would improve
    3. Soil moisture would decrease and food production would decrease
    4. Soil moisture would increase and food production would decrease

    Option: C

  5. What effect would the depletion of ozone layer have on phytoplanktons in marine ecosystems?

    Options:
    1. It would increase their growth and yield
    2. It would have no effect on them
    3. It would greatly reduce their photosynthesis and many of them would die
    4. It would increase their photosynthesis and yield

    Option: C

  6. How would the reduction of phytoplanktons affect zooplanktons and other marine organisms?

    Options:
    1. It would have no effect on them
    2. It would increase their population
    3. It would reduce their population as they feed on phytoplanktons
    4. It would improve their growth and yield

    Option: C

  7. What effect would the depletion of ozone layer and the increase in greenhouse gases have on vegetation and animal communities?

    Options:
    1. It would have no effect on them
    2. It would increase their growth and yield
    3. It would affect the type, density and stability of vegetation which would in turn affect animal communities and sediment and chemical element cycles
    4. It would increase the temperature of the earth’s surface and have no effect on vegetation and animal communities

    Option: C

  8. What gas causes pollution and adversely affects plant community?

    Options:
    1. Oxygen
    2. Carbon dioxide
    3. Sulphur dioxide
    4. Nitrogen oxide

    Option: C

  9. Which organisms are more susceptible to sulphur dioxide and other air pollutants?

    Options:
    1. Fishes
    2. Mammals
    3. Birds
    4. Lichens

    Option: D

  10. What happens to lichens in zones with high concentration of sulphur dioxide and other air pollutants?

    Options:
    1. They grow and reproduce more
    2. They have no effect on them
    3. They die
    4. They develop resistance to air pollutants

    Option: C