Haloalkanes and Haloarenes Book Back Questions

11th Standard

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Chemistry

Time : 00:45:00 Hrs
Total Marks : 30
    5 x 1 = 5
  1. The IUPAC name of  is

    (a)

    2-Bromo pent – 3 – ene

    (b)

    4-Bromo pent – 2 – ene

    (c)

    2-Bromo pent – 4 – ene

    (d)

    4-Bromo pent – 1 – ene

  2. Of the following compounds, which has the highest boiling point?

    (a)

    n-Butyl chloride

    (b)

    Isobutyl chloride

    (c)

    t-Butyl chloride

    (d)

    n-propyl chloride

  3. What should be the correct IUPAC name of diethyl chloromethane?

    (a)

    3 – Chloro pentane

    (b)

    1-Chloropentane

    (c)

    1-Chloro-1, 1, diethyl methane

    (d)

    1 –Chloro-1-ethyl propane

  4. Benzene reacts with Cl2 in the presence of FeCl3 and in absence of sunlight to form

    (a)

    Chlorobenzene

    (b)

    Benzyl chloride

    (c)

    Benzal chloride

    (d)

    Benzene hexachloride

  5. Which of the following reagent is helpful to differentiate ethylene dichloride and ethylidene chloride?

    (a)

    Zn / methanol

    (b)

    KOH / ethanol

    (c)

    aqueous KOH

    (d)

    ZnCl2 / Con HCl

  6. 8 x 2 = 16
  7. Why chlorination of methane is not possible in dark?

  8. How will you prepare n propyl iodide from n-propyl bromide?

  9. Give reasons for polarity of C-X bond in halo alkane.

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

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

  12. Write a chemical reaction useful to prepare the following:
    i) Freon-12 from Carbon tetrachloride
    ii) Carbon tetrachloride from carbon disulphide

  13. Explain the mechanism of SN1 reaction by highlighting the stereochemistry behind it

  14. Explain the preparation of the following compounds
    i) DDT ii) Chloroform
    iii) Biphenyl
    iv) Chloropicrin
    v) Freon-12

  15. 3 x 3 = 9
  16. An organic compound (A) with molecular formula C2H5Cl reacts with KOH gives compounds (B) and with alcoholic KOH gives compound (C). Identify (A),(B), and (C)

  17. A hydrocarbon C3H6 (A) reacts with HBr to form compound (B). Compound (B) reacts with aqueous potassium hydroxide to give (C) of molecular formula C3H6O.what are (A) (B) and (C). Explain the reactions.

  18. Two isomers (A) and (B) have the same molecular formula C2H4Cl2. Compound (A) reacts with aqueous KOH gives compound (C) of molecular formula C2H4O. Compound (B) reacts with aqueous KOH gives compound(D) of molecular formula C2H6O2. Identify (A), (B), (C) and (D).

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