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NEET-XII-Chemistry

02: Alcohols, Phenols and Ethers

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02-Alcohols, Phenols and Ethers
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  • Ans : 2-Bromo-3-methylbut-2-en-1-ol

    SECTION I SECTION I Page No 325:
  • Qstn #4
    Show how are the following alcohols prepared by the reaction of a suitable

    Grignard reagent on methanal?
    ()
    ()
    Ans : null ()
    ()
  • Qstn #5
    Write structures of the products of the following reactions:
  • Qstn #6
    Give structures of the products you would expect when each of the following alcohol reacts with (a ) HCl-ZnCl2 (b) HBr and (c) ``\ce{SOCl2}``.

    (i ) Butan-1-ol

    (ii) 2-Methylbutan-2-ol
    Ans : (a)

    (i)



    Primary alcohols do not react appreciably with Lucas’ reagent (HCl-ZnCl2) at room temperature.

    (ii)



    Tertiary alcohols react immediately with Lucas’ reagent.

    (b)

    (i)



    (ii)



    (c)

    (i)



    (ii)


  • Qstn #7
    Predict the major product of acid catalysed dehydration of
    Ans :





    (ii)


  • Qstn #8
    Ortho and para nitrophenols are more acidic than phenol. Draw the resonance structures of the corresponding phenoxide ions.
    Ans :

    Resonance structure of the phenoxide ion



    Resonance structures of p-nitrophenoxide ion



    Resonance structures of o-nitrophenoxide ion

    It can be observed that the presence of nitro groups increases the stability of phenoxide ion.
  • Qstn #9
    Write the equations involved in the following reactions:
    Ans :

    1. Reimer-Tiemann reaction





    1. Kolbe’s reaction




    SECTION I SECTION I Page No 342:

  • Qstn #9-i
    Reimer-Tiemann reaction
    () Kolbe’s reaction
    Ans : ()
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