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General Knowledge :: Chemistry

  1. The most important ore of aluminium is

  2. A.
    bauxite
    B.
    magnetite
    C.
    haematite
    D.
    monazite

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

  4. A.
    an addition reaction
    B.
    a condensation reaction
    C.
    an oxidation reaction
    D.
    an elimination reaction

  5. The number of electrons presents in H+ is

  6. A.
    zero
    B.
    one
    C.
    two
    D.
    three

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

  8. A.
    luminous zone
    B.
    dark zone
    C.
    blue zone
    D.
    non-luminous zone

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

  10. A.
    carbon
    B.
    hydrogen
    C.
    oxygen
    D.
    nitrogen

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

  12. A.
    chain isomerism
    B.
    functional group isomerism
    C.
    positional isomerism
    D.
    metamerism

  13. 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?

  14. A.
    1/6
    B.
    1/3
    C.
    1/8
    D.
    1/4

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

  16. A.
    4
    B.
    5
    C.
    2
    D.
    zero

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

  18. A.
    1.8 gram of H2O
    B.
    12 moles of KMnO4
    C.
    0.6N H2SO4
    D.
    4.6 gram of C2H5OH

  19. The National Chemical Laboratory is situated in

  20. A.
    New Delhi
    B.
    Bangalore
    C.
    Pune
    D.
    Patna