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  1. The constituents of automobile exhaust that can cause cancer is/are :

  2. A.

     Oxides of nitrogen

    B.

     Carbon monoxide

    C.

     Polycyclic hydrocarbons

    D.

     Lead

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  3. The acid rain destroys vegetations because it contains

  4. A.

     Nitric acid

    B.

     Ozone

    C.

     Carbon monoxide

    D.

     Sulphuric acid

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  5. Of the following, which one pollutes the air of a big city ?

  6. A.

     Copper

    B.

     Chromium

    C.

     Lead

    D.

     Cadmium

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  7. Of the following which one pollutes the air of a big city ?

  8. A.

     Copper

    B.

     Chromium

    C.

     Lead

    D.

     Calcium

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  9. Which of the following is usually not an air-pollutant?

  10. A.

     Hydrocarbons

    B.

     Sulphur dioxide

    C.

     Carbon dioxide

    D.

     Nitrous oxide

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  11. Which of the following pollutants is main product of automobile exhaust ?

  12. A.

     CO

    B.

     CO2

    C.

     NO

    D.

     Hydrocarbons

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  13. The smog is essentially caused by the presence of

  14. A.

     O3 and N2

    B.

     O2 and N2

    C.

     Oxides of N and S

    D.

     O2 and O3

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  15. The depletion in Ozone layer is caused by ________ .

  16. A.

     Nitrous oxide

    B.

     Carbon dioxide

    C.

     Chlorofluorocarbons

    D.

     Methane

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  17. Which of the following is the maximum number of electrons that can be present in M-shell?

  18. A.

     2

    B.

     8

    C.

     18

    D.

     32

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  19. Atoms of different elements have

  20. A.

     Same atomic number and same electronic configuration

    B.

     Different atomic number and same eletronic configu-ration

    C.

     Different atomic number and different number of valence electrons

    D.

     Same number of electrons and neutrons

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