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General Knowledge :: Chemistry

  1. The nucleus of an atom consists of

  2. A.
    electrons and neutrons
    B.
    electrons and protons
    C.
    protons and neutrons
    D.
    All of the above

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  3. The number of moles of solute present in 1 kg of a solvent is called its

  4. A.
    molality
    B.
    molarity
    C.
    normality
    D.
    formality

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  5. The most electronegative element among the following is

  6. A.
    sodium
    B.
    bromine
    C.
    fluorine
    D.
    oxygen

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  7. The metal used to recover copper from a solution of copper sulphate is

  8. A.
    Na
    B.
    Ag
    C.
    Hg
    D.
    Fe

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  9. The number of d-electrons in Fe2+ (Z = 26) is not equal to that of

  10. A.
    p-electrons in Ne(Z = 10)
    B.
    s-electrons in Mg(Z = 12)
    C.
    d-electrons in Fe(Z = 26)
    D.
    p-electrons in CI(Z = 17)

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  11. The metallurgical process in which a metal is obtained in a fused state is called

  12. A.
    smelting
    B.
    roasting
    C.
    calcinations
    D.
    froth floatation

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  13. The molecules of which gas have highest speed?

  14. A.

    H2 at -73oC

    B.

    CH4 at 300 K

    C.

    N2 at 1,027oC

    D.

    O2 at 0oC

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  15. The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's called

  16. A.
    granite
    B.
    basalt
    C.
    igneous rocks
    D.
    sedimentary rocks

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  17. The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is

  18. A.
    Dalton's law
    B.
    Gay Lussac's law
    C.
    Henry's law
    D.
    Raoult's law

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  19. The main buffer system of the human blood is

  20. A.
    H2CO3 - HCO3
    B.
    H2CO3 - CO32-
    C.
    CH3COOH - CH3COO-
    D.
    NH2CONH2 - NH2CONH+

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