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General Knowledge :: Chemistry

  1. Which type of radiations are absorbed by the upper layer of the atmosphere?

  2. A.

     Radio-waves

    B.

     Infrared

    C.

     Visible

    D.

     Ultraviolet


  3. Sulphur dioxide level in the atmosphere can be reduced by using

  4. A.

     More efficient car engines

    B.

     Catalytic converters in industry

    C.

     Static electricity to attract it in factory chimneys

    D.

     Low - sulphur fuels


  5. The term 'brown air' is used for

  6. A.

     Acid fumes

    B.

     Photochemical smog

    C.

     Sulphurous smog

    D.

     Industrial smog


  7. The sewage obtained from water closets and urinals is known as

  8. A.

     Sanitary waste

    B.

     Industrial waste

    C.

     Garbage

    D.

     Sullage


  9. Which one amongst the following is not a Green House gas?

  10. A.

     Nitrogen

    B.

     Carbon dioxide

    C.

     Carbon Monoxide

    D.

     Chloro fluoro carbons


  11. Which of the following is not a greenhouse gas ?

  12. A.

     Hydrogen

    B.

     Carbon dioxide

    C.

     Nitric oxide

    D.

     Chlorofluorocarbon


  13. Which is abundant in Gobar gas?

  14. A.

     Carbon dioxide

    B.

     Methane

    C.

     Oxygen

    D.

     Hydrogen


  15. Concentration of a material which is lethal to 50% animal is called

  16. A.

     LD50

    B.

     LC50

    C.

     NOAEL

    D.

     ADI


  17. The major harmful gas emitted by automobile vehicle which causes air pollution is

  18. A.

     Carbon Monoxide

    B.

     Methane

    C.

     Carbon dioxide

    D.

     Ozone gas


  19. The major harmful gas emitted by automobile vehicles which causes air pollution is

  20. A.

     Carbon Monoxide

    B.

     Methane

    C.

     Carbon dioxide

    D.

     Ozone gas