Self Studies

Environmental C...

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  • Question 1
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    Ozone layer depletion is caused by

  • Question 2
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    Study the following statements regarding acid rain and select the incorrect ones.


    (i) Acid rain refers to the rainfall and other forms of precipitation with a pH of less than 5.
    (ii) Oxides of sulphur and nitrogen are released from automobile exhausts, industries, power plants, etc.
    (iii) These oxides of sulphur and nitrogen, may react with water in the air and form sulphuric acid $$ \left( { H }_{ 2 }{ SO }_{ 4 } \right)  $$ and nitric acid $$ \left( { HNO }_{ 3 } \right)  $$
    (iv) Acid rain has harmful effects on animals and human beings but no characteristic impact on plants.

  • Question 3
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    When there is depletion of ozone in the stratosphere the wavelength of radiation striking the earth's surface will be ............

  • Question 4
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    Soil is a natural medium for growth of land plants. Organic soil contains organic number upto a depth of

  • Question 5
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    Match the column I with column II and mark the appropriate choice

    Column IColumn II
    (A) Troposphere(i) Prevents UV rays coming to earth
    (B) Stratosphere(ii) Ionization of gases
    (C) Mesosphere(iii) Maintenance of heat balance
    (D) Thermosphere(iv) Non-propagation of sound waves

  • Question 6
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    Match the column I with column II and mark the appropriate choice.

    Column IColumn II
    (A)Peroxyacetyl nitrate(i)Global warming
    (B)Polychlorinated biphenyls(ii)Photochemical smog
    (C)Dioxides of carbon and sulphur(iii)Water pollutant
    (D)IR active molecules(iv)Acid rain

  • Question 7
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    Match the column I with column II and mark the appropriate choice.


    Column I
    (Pollutants)
    Column II
    (Source)
    (a)Toxic heavy metals(i)Domestic sewage
    (b)Microorganisms(ii)Industries and chemical factories
    (c)Organic wastes(iii)Chemical fertilizers
    (d)Plant nutrients(iv)Discharge from food processing factories

  • Question 8
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    Mark the example which in not correctly matched?

  • Question 9
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    Ozone layer of upper atmosphere is being destroyed by

  • Question 10
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    Acid rains are produced by

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