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Chemistry - section - 2
  1. Which one of the following metals pollutes the air of a city having large number of automobiles?

    2. A.

     Cadmium
    B.

     Chromium
    C.

     Lead
    D.

     Copper

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  2. Pollutant from motor car exhaust that causes mental disease is

    3. A.

     Lead
    B.

     NO2
    C.

     SO2
    D.

     Hg

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  3. The most common cause of pollution of air is

    4. A.

     Carbon dioxide
    B.

     Carbon monoxide
    C.

     Sulphur dioxide
    D.

     Smoke

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  4. Particulates (< 1 µm size) remaining suspended in air indefinitely and transported by wind currents are called

    5. A.

     Mists
    B.

     Fumes
    C.

     Aerosols
    D.

     Smoke

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  5. Mercury is emitted into air by

    6. A.

     Burning coal
    B.

     Burning garbage
    C.

     Coal fire
    D.

     Steam engine

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  6. 'Acid rain' is caused due to air pollution by

    7. A.

     Carbon dioxide
    B.

     Carbon monoxide
    C.

     Methane
    D.

     Nitrous oxide and sulphur dioxide

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  7. Gas released during Bhopal tragedy was :

    8. A.

     Sodium isothiocyanate
    B.

     Potassium isothiocyanate
    C.

     Ethyl isocyanate
    D.

     Methyl isocyanate

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  8. The filter over which sewage is sprinkled is called as

    9. A.

     Trickling filter
    B.

     Percolating filter
    C.

     Contact bed
    D.

     Intermittent sand filter

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  9. Main source of lead pollution is from

    10. A.

     Sewage
    B.

     Leaded gasoline
    C.

     Tobacco
    D.

     Insecticides

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  10. An example of major air pollutant is

    11. A.

     Oxygen
    B.

     Carbon monoxide
    C.

     Helium
    D.

     Carbon dioxide

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