JEE Main & Advanced Chemistry Aldehydes, Ketones Question Bank Properties

  • question_answer
    Which one of the following on oxidation will not give a carboxylic acid with the same number of carbon atoms [CBSE PMT 1992; MP PET 1996]

    A)                 \[C{{H}_{3}}COC{{H}_{3}}\]        

    B)                 \[CC{{l}_{3}}C{{H}_{2}}CHO\]

    C)                 \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\]   

    D)                 \[C{{H}_{3}}C{{H}_{2}}CHO\]

    Correct Answer: A

    Solution :

                    \[C{{H}_{3}}-\overset{O\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{||}{\mathop{C}}\,-C{{H}_{3}}}}\,\underset{{{H}_{2}}S{{O}_{4}}}{\mathop{\xrightarrow{{{K}_{2}}C{{r}_{2}}{{O}_{7}}}}}\,C{{H}_{3}}COOH+HCOOH\] one carbon atom is less in the ketone group


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