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General Knowledge :: Chemistry

  1. The hardest form of carbon is

  2. A.

     coke

    B.

     graphite

    C.

     diamond

    D.

     charcoal


  3. The most important ore of aluminium is

  4. A.

     bauxite

    B.

     magnetite

    C.

     haematite

    D.

     monazite


  5. The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H2O is an example of

  6. A.

     an addition reaction

    B.

     a condensation reaction

    C.

     an oxidation reaction

    D.

     an elimination reaction


  7. The number of electrons presents in H+ is

  8. A.

     zero

    B.

     one

    C.

     two

    D.

     three


  9. The hottest part of the gas flame is known as

  10. A.

     luminous zone

    B.

     dark zone

    C.

     blue zone

    D.

     non-luminous zone


  11. The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is

  12. A.

     carbon

    B.

     hydrogen

    C.

     oxygen

    D.

     nitrogen


  13. The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is

  14. A.

     chain isomerism

    B.

     functional group isomerism

    C.

     positional isomerism

    D.

     metamerism


  15. The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?

  16. A.

     1/6

    B.

     1/3

    C.

     1/8

    D.

     1/4


  17. The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3

  18. A.

     4

    B.

     5

    C.

     2

    D.

     zero


  19. The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in

  20. A.

     1.8 gram of H2O

    B.

     12 moles of KMnO4

    C.

     0.6N H2SO4

    D.

     4.6 gram of C2H5OH