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Haloalkanes and Haloarenes Model Question Paper

11th Standard

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Chemistry

Time : 01:00:00 Hrs
Total Marks : 50
    5 x 1 = 5
  1. Which of the following is secondary alkyl halide?

    (a)

    Iso butyl chloride

    (b)

    Isopentyl chloride

    (c)

    Neopentyl chloride

    (d)

    Isopropyl chloride

  2. Grignard reagent is prepared by between___________.

    (a)

    Zin and alkyl halide

    (b)

    Magnesium and alkyl halide

    (c)

    Magnesium and alkane

    (d)

    Copper and aromatic hydrocarbon

  3. Among the following, which is not an allylic halide?

    (a)

    3-bromo-i-methyl propene

    (b)

    4-bromo but-l-ene and

    (c)

    3-bromo-2-methyl but -1- ene

    (d)

    All of these

  4. The order of stability of the carbonium ion is__________.

    (a)

    1°> 2°>3°

    (b)

    2°> 3°>1°

    (c)

    2°> 1°>3°

    (d)

    3°>2°>1o

  5. ___________is used in fire extinguishers

    (a)

    CCl2 = CCl2

    (b)

    CHCl = CCl2

    (c)

    CH2 = CCl2

    (d)

    CCl4

  6. 5 x 2 = 10
  7. Write the isomers of the compound whose molcular formula is C4H9Br.

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

  9. Explain Swarts reaction.

  10. What happens when silver propionate reacts with Br2 in CCI4?

  11. What is Grignard reagent? How is it prepared from ethyl bromide?

  12. 5 x 3 = 15
  13. Showthat ethylene dichloride undergoes
    (i) Hydrolysis
    (ii) Dehalogenation
    (iii) Dehydrohalognenation

  14. How would you prepare acetic acid from methyl magnesium iodide?

  15. What are polyhalogen compounds? Give its types with example.

  16. Explain two methods of preparation of ethylene dichloride

  17. Write the equations for the preparation of l-iodobutane from.

  18. 4 x 5 = 20
  19. Answer the following.
    (i) Predict the major product formed when HCI is added to iso-butylene,
    (ii) What happens when CH3-Br is treated with KCN?
    (iii) Identify the chiral molecule in the following pair.

    (iv) Arrange the compounds in the order of I reactivity towards SN2 displacement. 2-Bromo-2-methylbutane, I-Bromopentane, 2-Bromo pentane.

  20. Starting from methyl magnesium iodide, how would you prepare
    (i) Ethyl methyl ether
    (ii) methyl cyanide
    (iii) methane

  21. The simplest aromatic hydrocarbon C6H6 reactsⒷ on treatment with sodium hydroxide will (C6H5OH), Phenol, © as the product. Also Cl2 to giveⒶ which on reaction with sodium hydroxide gives Ⓑ.Ⓑ of molecular formula C6H6O. @ on treatment with ammonia will give C6H7N as @. Identify Ⓐ, Ⓑ, ©, and explain the reactions involved.

  22. An organic compound Ⓐ of molecular formula CH2O reacts with methyl magnesium iodide followed by acid hydrolysis to give Ⓑ of molecular formula C2H60. Ⓑ on reaction with PCIs gives ©. ©on reaction with alcoholic KOH gives Ⓓan alkene as the product. Identify Ⓐ, Ⓑ ©, Ⓓ and explain the reactions involved.

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