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Haloalkanes and Haloarenes Two Marks Questions

11th Standard

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Chemistry

Time : 00:45:00 Hrs
Total Marks : 30
    15 x 2 = 30
  1. Give reasons for polarity of C-X bond in halo alkane.

  2. Why is it necessary to avoid even traces of moisture during the use of Grignard reagent?

  3. What happens when acetyl chloride is treated with excess of CH3MgI?

  4. What happens when chloroform reacts with oxygen in the presence of sunlight?

  5. Mention any three methods of preparation of haloalkanes from alcohols.

  6. Compare SN1 and SN2 reaction mechanisms.

  7. In an experiment ethyliodide in ether is allowed to stand over magnesium pieces. Magnesium dissolves and product is formed
    a) Name the product and write the equation for the reaction.
    b) Why all the reagents used in the reaction should be dry? Explain
    c) How is acetone prepared from the product obtained in the experiment.

  8. What are Freons? Discuss their uses and environmental effects

  9. Starting from CH3MgI, How will you prepare the following?
    i) Acetic acid
    ii) Acetone
    iii) Ethyl acetate
    iv) Iso propyl alcohol
    v) Methyl cyanide.

  10. Write a brief note on ammonolysis of haloalkane.

  11. Define Walden inversion

  12. How does benzene diazonium chloride react with HBF4?

  13. Write a note on carbylamine reaction.

  14. Consider the reaction, R-OH \(\overset { RedP/{ x }_{ 2 } }{ \longrightarrow } \)R-X (where, X = Br,I) Is it possible to prepare aryl halide through the above method? Give reason

  15. Why does the preparation of aryl iodides requires the presence of an oxidising agent?

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