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BCECE Engineering BCECE Engineering Solved Paper-2004

  • question_answer
    Write the IUPAC name of: \[C{{H}_{3}}-C{{H}_{2}}-\underset{C{{H}_{3}}}{\overset{OH}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-C{{H}_{2}}-C{{H}_{3}}\]

    A) 3- methylpentane-3-ol

    B) 3-hydroxyhexane

    C) 3-hydroxy-3-methyl pentane

    D) all of the above

    Correct Answer: A

    Solution :

    \[\underset{3-methyl\,pen\tan \,3-ol}{\mathop{\overset{5}{\mathop{C{{H}_{3}}}}\,-\overset{4}{\mathop{C{{H}_{2}}}}\,-\underset{C{{H}_{3}}}{\overset{OH}{\mathop{\underset{|}{\overset{3|}{\mathop{C}}}\,}}}\,-\overset{2}{\mathop{C{{H}_{2}}}}\,\overset{1}{\mathop{C{{H}_{3}}}}\,}}\,\] Hydroxy is used when -OH group is written in prefix. So, choice (b) and (c) are wrong.


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