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  1. The tree sends down roots from its branches to the soil is know as:

  2. A.

     Oak

    B.

     Pine

    C.

     Banyan

    D.

     Palm

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  3. Electric bulb filament is made of

  4. A.

     Copper

    B.

     Aluminum

    C.

     Lead

    D.

     Tungsten

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  5. Brass gets discoloured in air because of the presence of which of the following gases in air?

  6. A.

     Oxygen

    B.

     Hydrogen Sulphide

    C.

     Carbon dioxide

    D.

     Nitrogen

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  7. Which of the following is a non metal that remains liquid at room temperature?

  8. A.

     Phosphorous

    B.

     Bromine

    C.

     Chlorine

    D.

     Helium

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  9. Chlorophyll is a naturally occurring chelate compound in which central metal is

  10. A.

     Copper

    B.

     Magnesium

    C.

     Iron

    D.

     Calcium

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  11. Which of the following is used in pencils?

  12. A.

     Graphite

    B.

     Silicon

    C.

     Charcoal

    D.

     Phosphorous

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  13. Which of the following metals forms an amalgam with other metals?

  14. A.

     Tin

    B.

     Mercury

    C.

     Lead

    D.

     Zinc

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  15. Chemical formula for water is

  16. A.

     NaA1O2

    B.

     H2O

    C.

     Al2O3

    D.

     CaSiO3

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  17. The gas usually filled in the electric bulb is

  18. A.

     Nitrogen

    B.

     Hydrogen

    C.

     Carbon dioxide

    D.

     Oxygen

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  19. Washing soda is the common name for

  20. A.

     Sodium Carbonate

    B.

     Calcium Bicarbonate

    C.

     Sodium Bicarbonate

    D.

     Calcium Carbonate

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