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General Knowledge :: Chemistry

  1. Which of the following phenomenon is considered responsible for Global Warming?

  2. A.

     Greenhouse effect

    B.

     Fire in coal mines

    C.

     Dry farming

    D.

     Monsoon

    E.

     Trade winds


  3. The nucleus of an atom consists of

  4. A.

     electrons and neutrons

    B.

     electrons and protons

    C.

     protons and neutrons

    D.

     All of the above


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

  6. A.

     molality

    B.

     molarity

    C.

     normality

    D.

     formality


  7. The most electronegative element among the following is

  8. A.

     sodium

    B.

     bromine

    C.

     fluorine

    D.

     oxygen


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

  10. A.

     Na

    B.

     Ag

    C.

     Hg

    D.

     Fe


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

  12. 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)


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

  14. A.

     smelting

    B.

     roasting

    C.

     calcinations

    D.

     froth floatation


  15. The molecules of which gas have highest speed?

  16. A.

     H2 at -73oC

    B.

     CH4 at 300 K

    C.

     N2 at 1,027oC

    D.

     O2 at 0oC


  17. 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

  18. A.

     granite

    B.

     basalt

    C.

     igneous rocks

    D.

     sedimentary rocks


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

  20. A.

     Dalton's law

    B.

     Gay Lussac's law

    C.

     Henry's law

    D.

     Raoult's law