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Environmental I...

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  • Question 1
    1 / -0

    Catalytic converters are fitted into automobiles to reduce emission of harmful gases. Catalytic converters change unburnt hydrocarbons into ________________.

  • Question 2
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    Which of the following statements regarding ozone is incorrect ?

  • Question 3
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    Read the given statements and select the correct option. 
    Statement 1 : Reforestation is the process of restoring a forest that once existed but was removed at some point of time in the past.
    Statement 2 : Reforestation may occur naturally in a deforested area, however it can be speeded up by planting trees with due consideration to biodiversity that earlier existed in that area.

  • Question 4
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    In the event of global warming, which one of the following is most likely to occur?

  • Question 5
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    Compressed Natural Gas (CNG) is _____________.

  • Question 6
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    Read the following statements carefully and select the incorrect ones.


    (i)  Development of the fertile top-soil takes centuries, but it can be easily removed due to human activities such as over-cultivation, unrestricted grazing, etc.
    (ii) Waterlogging results in soil salinity.
    (iii)  UV rays are responsible for the degradation of the ozone shield in the atmosphere.
    (iv)  Ozone present in the stratosphere acts as a shield absorbing UV radiation coming from the Sun.
    (v)  Global warming can be controlled by increasing the use of fossil fuels.

  • Question 7
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    Consider the following statements regarding the ecosystem which helps in reducing the level of pollution in the atmosphere.
    $$1$$. Ecosystems and ecological processes play an important role in maintenance of gaseous composition of the atmosphere, breakdown of wastes and removal of pollutants.
    $$2$$. Some ecosystems, especially wetlands have the ability to breaking down and absorb pollutants.
    $$3$$. Natural and artificial wetlands are being used to filter effluents to remove nutrients, heavy metals, suspended solids; reduce the BOD (Biological Oxygen Demand) and destroy harmful micro-organisms.
    Which of the statements given is/are correct?

  • Question 8
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    When we destroy forest, what we are actually destroying?

  • Question 9
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    Multiple Choice Questions
    BOD is a measure of

  • Question 10
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    Multiple Choice Questions
    Global warming can be controlled by

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