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CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2005

  • question_answer
    A compound, containing only carbon, hydrogen and oxygen, has a molecular weight of 44. On complete oxidation it is converted into a compound of molecular weight 60. The original compound is :

    A)  an aldehyde

    B)  an acid

    C)  ail alcohol

    D)  an ether

    Correct Answer: A

    Solution :

    On complete oxidation the obtained compound shows in/creament in molecular weight of only 16. It means only one oxygen atom is added here. This condition is fulfilled by only aldehyde which on oxidation gives acid.                 \[RCHO\xrightarrow{[O]}RCOOH\] \[\therefore \] original compound must be \[\underset{Mol.wt.44}{\mathop{C{{H}_{3}}CHO}}\,\xrightarrow{[O]}\underset{Mol.w.t.60}{\mathop{C{{H}_{3}}COOH}}\,\]


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