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General Science - section-1
General Science - section - 2
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General Science - Elements and Metals
General Science - Synthetic Materials
  1. In which of the following activities silicon carbide is used?

    2. A.

     Making cement and glass
    B.

     Disinfecting water of ponds
    C.

     Cutting very hard substances
    D.

     Making casts for statues

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  2. The average salinity of sea water is

    3. A.

     3%
    B.

     3.5%
    C.

     2.5%
    D.

     2%

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  3. When an iron nail gets rusted, iron oxide is formed

    4. A.

     Without any change in the weight of the nail
    B.

     With decrease in the weight of the nail
    C.

     With increase in the weight of the nail
    D.

     Without any change in colour or weight of the nail

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  4. Galvanised iron sheets have a coating of

    5. A.

     Lead
    B.

     Chromium
    C.

     Zinc
    D.

     Tin

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  5. Among the various allotrope of carbon

    6. A.

     Coke is the hardest, graphite is the softest
    B.

     Diamond is the hardest, coke is the softest
    C.

     Diamond is the hardest, graphite is the softest
    D.

     Diamond is the hardest, lamp black is the softest

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  6. The group of metals Fe, Co, Ni may best called as:

    7. A.

     Transition metals
    B.

     Main group metals
    C.

     Alkali metals
    D.

     Rare metals

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  7. Heavy water is:

    8. A.

     Deuterium oxide
    B.

     PH7
    C.

     Rain water
    D.

     Tritium oxide

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  8. The chemical (Ethyl Mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of:

    9. A.

     Bromine
    B.

     Fluorine
    C.

     Chlorine
    D.

     Sulphur

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  9. The element common to all acids is

    10. A.

     Hydrogen
    B.

     Carbon
    C.

     Sulphur
    D.

     Oxygen

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  10. Non stick cooking utensils are coated with

    11. A.

     Black paint
    B.

     PVC
    C.

     Teflon
    D.

     polystyrene

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