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Practice Paper for CBSE Class 12 Chemistry 2013 Set 2

Feb 22, 2013 15:08 IST

    CBSE Chemistry Practice Paper 2013 Set 2, given here.

    5. Draw the structural formula of 2-methylpropane-2-ol molecule.

    6. Arrange the following compounds in an increasing order of their reactivity in nucleophilic addition reaction- ethanol, propanal, propanone, butanone.

    7. Arrange the following in the decreasing order of their basic strength in aqueous solution- CH3NH2, (CH3)2NH, (CH3)3N and NH3.

    8. Define the term, homopolymerization, giving an example.

    9. A 1.00 molal aqueous solution of trichloroacetic acid (CCl3COOH) is heated to its boiling point. The solution has the boiling point of 100.18 0C. Determine the van’t Hoff factor for trichloroacetic acid. (Kb for water = 0.512 K kg mol-1)

    10. Define the following terms-

    a. Mole fraction

    b. Isotonic solution

    c. Van’t hoff factor

    d. Ideal solution

    11. Name the two groups into which phenomenon of catalysis can be divided. Give an example of each group with chemical equation involved.

    12. What is meant by coagulation of colloidal solution?describe brefily any three methords by which cogulation of lyophobic sols can be carried out.

    13. Describe the principle involved in each of the following-

    a. Mond process for refining of nickel

    b. Column chromatography for purification of rare elements

    14. Explain the following giving an appropriate reason in each case.

    a. O2 and F2 both stabilise higher oxidation states of metals but O2 exceed F2 in doing so.

    b. Structure of Xenon fluorides cannot be explained by Valence Bond approach.

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