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General Knowledge :: Chemistry

  1. The main buffer system of the human blood is

  2. A.

     H2CO3 - HCO3

    B.

     H2CO3 - CO32-

    C.

     CH3COOH - CH3COO-

    D.

     NH2CONH2 - NH2CONH+

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  3. The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is

  4. A.

     helium

    B.

     ozone

    C.

     oxygen

    D.

     methane

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  5. The most commonly used bleaching agent is

  6. A.

     alcohol

    B.

     carbon dioxide

    C.

     chlorine

    D.

     sodium chlorine

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  7. The nucleus of a hydrogen atom consists of

  8. A.

     1 proton only

    B.

     1 proton + 2 neutron

    C.

     1 neutron only

    D.

     1 electron only

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  9. The heat required to raise the temperature of body by 1 K is called

  10. A.

     specific heat

    B.

     thermal capacity

    C.

     water equivalent

    D.

     None of the above

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  11. The nuclear particles which are assumed to hold the nucleons together are

  12. A.

     electrons

    B.

     positrons

    C.

     neutrons

    D.

     mesons

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  13. The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is

  14. A.

     2.05 gram

    B.

     3.05 gram

    C.

     4.05 gram

    D.

     5.05 gram

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  15. The octane number of zero is assigned to

  16. A.

     2-methyl octane

    B.

     n-heptane

    C.

     iso-octane

    D.

     3-methyl octane

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  17. The metal that is used as a catalyst in the hydrogenation of oils is

  18. A.

     Ni

    B.

     Pb

    C.

     Cu

    D.

     Pt

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  19. The most abundant rare gas in the atmosphere is

  20. A.

     He

    B.

     Ne

    C.

     Ar

    D.

     Xe

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