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NEET-XII-Chemistry

03: Aldehydes Ketones and Carboxylic Acids

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03-Aldehydes Ketones and Carboxylic Acids
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    3 - Aldehydes, Ketones and Carboxylic Acids
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    Section : I
    SECTION I Page No 353:
  • Qstn #1
    Write the structures of the following compounds.
  • Qstn #2
    Write the structures of products of the following reactions;
  • Qstn #3
    Arrange the following compounds in increasing order of their boiling points.

    CH3CHO, CH3CH2OH, CH3OCH3, CH3CH2CH3
    Ans : The molecular masses of the given compounds are in the range 44 to 46. CH3CH2OH undergoes extensive intermolecular H-bonding, resulting in the association of molecules. Therefore, it has the highest boiling point. CH3CHO is more polar than CH3OCH3 and so CH3CHO has stronger intermolecular dipole - dipole attraction than CH3OCH3â‹… CH3CH2CH3 has only weak van der Waals force. Thus, the arrangement of the given compounds in the increasing order of their boiling points is given by:

    CH3CH2CH3 < CH3OCH3 < CH3CHO < CH3CH2OH
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