JEE Main & Advanced Chemistry GOC Question Bank Structural and stereo isomerism

  • question_answer Which of the following pairs is an example of position isomerism

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

    B) \[C{{H}_{3}}-C{{H}_{2}}-CH=C{{H}_{2}}\] and \[C{{H}_{3}}-CH=CH-C{{H}_{3}}\]

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

    D)  \[C{{H}_{3}}-\underset{C{{H}_{3}}\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{C{{H}_{3}}\,\,\,\,\,\,\,\,}{\mathop{\overset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C-C{{H}_{3}}\,}}\,}}\,}}\,}}\,\]and\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\]

    Correct Answer: B

    Solution :

      \[\underset{1-\text{butane}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-CH=C{{H}_{2}}}}\,\]&\[\underset{2-\text{butane}}{\mathop{C{{H}_{3}}-CH=CH-C{{H}_{3}}}}\,\]

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