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General Knowledge :: Chemistry

  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


  3. The acid rain destroys vegetations because it contains

  4. A.

     Nitric acid

    B.

     Ozone

    C.

     Carbon monoxide

    D.

     Sulphuric acid


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

  6. A.

     Copper

    B.

     Chromium

    C.

     Lead

    D.

     Cadmium


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

  8. A.

     Copper

    B.

     Chromium

    C.

     Lead

    D.

     Calcium


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

  10. A.

     Hydrocarbons

    B.

     Sulphur dioxide

    C.

     Carbon dioxide

    D.

     Nitrous oxide


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

  12. A.

     CO

    B.

     CO2

    C.

     NO

    D.

     Hydrocarbons


  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


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

  16. A.

     Nitrous oxide

    B.

     Carbon dioxide

    C.

     Chlorofluorocarbons

    D.

     Methane


  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


  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