Haloalkanes and Haloarenes Model Question Paper

11th Standard

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Chemistry

Time : 02:00:00 Hrs
Total Marks : 50
    7 x 1 = 7
  1. With respect to the position of – Cl in the compound CH3 – CH = CH – CH2 – Cl, it is classified as

    (a)

    Vinyl

    (b)

    Allyl

    (c)

    Secondary

    (d)

    Aralkyl

  2. 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

  3. 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

  4. Freon-12 is manufactured from tetrachloro methane by

    (a)

    Wurtz reaction

    (b)

    Swarts reaction

    (c)

    Haloform reaction

    (d)

    Gattermann reaction

  5. The carbo cation formed in SN1 reaction of al kyl halide in the slow step is

    (a)

    sp3 hybridised

    (b)

    sp2 hybridised

    (c)

    sp hybridised

    (d)

    none of these

  6. The raw material for Rasching process

    (a)

    chloro benzene

    (b)

    phenol

    (c)

    benzene

    (d)

    anisole

  7. The order of correct bond energy of C - X bond is

    (a)

    C-CI>C-I>C-Br

    (b)

    C - CI > C - Br > C - I

    (c)

    C - I> C - CI > C - Br

    (d)

    C -I > C - Br > C - CI

  8. 5 x 1 = 5
  9. ________is used in the treatment of typhoid

    ()

    chloramphenicol

  10. _________is used as an anesthetic.

    ()

    Halothane

  11. The IUPAC name of CH2=CHCI is__________

    ()

    Chloroethene

  12. In Swarts reaction, chloroalkane is converted to___________

    ()

    Fluoroalkane

  13. Haloalkane reacts with alcoholic solution of KOH to form_______

    ()

    Alkene

  14. 5 x 1 = 5
  15. CH3Br + Aqueous KOH

  16. (1)

    CH3MgI + H2O

  17. Methane

  18. (2)

    Refrigent in refrigerator

  19. Iodoform

  20. (3)

    Antiseptic

  21. CF2Cl2

  22. (4)

    Solvent in paint remover

  23. CH2Cl2

  24. (5)

    SNmechanism

    7 x 2 = 14
  25. Why chlorination of methane is not possible in dark?

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

  27. Arrange the following alkyl halide in increasing order of bond enthalpy of RX
    CH3Br, CH3F, CH3Cl, CH3I

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

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

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

  31. Define Walden inversion

  32. 3 x 3 = 9
  33. 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)

  34. 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.

  35. Enlist the applications of haloalkanes.

  36. 2 x 5 = 10
  37. Explain the mechanism involved in bimolecular nucleophilic substitution reaction.

  38. Explain SN2mechanism with suitable examples.

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