JEE Main & Advanced Chemistry Organic Chemistry: Some Basic Principles & Techniques Question Bank Chemical analysis of organic compounds

  • question_answer Which of the following pair of the species has the same percentage of carbon [BHU 1999]

    A) \[C{{H}_{3}}-C{{H}_{2}}-\underset{\,\,C{{H}_{2}}C{{H}_{3}}\,\,\,\,\,}{\mathop{\underset{\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\overset{\overset{\,C{{H}_{3}}C{{H}_{2}}\,\,\,\,}{\mathop{\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,}{\mathop{C\,\,\,\,\,\,\,\,-\,\,\,\,\,\,}}}\,}}\,\overset{\overset{C{{H}_{3}}}{\mathop{|\,\,\,\,\,\,}}\,\,\,\,\,\,\,}{\mathop{CH\,-\,}}\,C{{H}_{2}}-{{(C{{H}_{2}})}_{2}}-C{{H}_{3}}\] and \[{{C}_{2}}{{H}_{5}}OH\]

    B) \[{{C}_{6}}{{H}_{12}}{{O}_{6}}\] and \[{{C}_{12}}{{H}_{22}}{{O}_{11}}\]

    C) \[{{C}_{6}}{{H}_{12}}{{O}_{6}}\] and \[{{C}_{12}}{{O}_{22}}{{O}_{11}}\]

    D) \[{{C}_{12}}{{O}_{22}}{{O}_{11}}\] and \[{{C}_{6}}{{H}_{12}}{{O}_{6}}\]

    Correct Answer: D

    Solution :

    \[C{{H}_{3}}COOH\] and \[{{C}_{6}}{{H}_{12}}{{O}_{6}}\] both have same percentage of carbon i.e. 40%.


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