BCECE Engineering BCECE Engineering Solved Paper-2014

  • question_answer
    An oxygen containing organic compound  upon oxidation forms a carboxylic acid as the only organic product with its molecular mass higher by 14 units. The organic compound is

    A) an aldehyde                      

    B) a orimary alcohol

    C) a secondary alcohol       

    D) a ketone

    Correct Answer: B

    Solution :

    Because the difference in mass between \[\text{C}{{\text{H}}_{2}}\text{OH}\] group and ?COOH group is 14, Thus the compound which undergoes oxidation is a primary alcohol. \[(-C{{H}_{2}}OH\] is the functional group of primary alcohols.) \[\underset{\text{primary alcohol}}{\mathop{\underset{\text{(R+31)}}{\mathop{\text{RC}{{\text{H}}_{\text{2}}}\text{OH}}}\,}}\,\xrightarrow{\text{ }\!\![\!\!\text{ O }\!\!]\!\!\text{ }}\underset{\text{acid}}{\mathop{\underset{\text{(R+45)}}{\mathop{\text{RCOOH}}}\,}}\,\]


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