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Uttarakhand PMT Uttarakhand PMT Solved Paper-2009

  • question_answer
    IUPAC name of the given compound is \[{{H}_{3}}C\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{C}}\,=\overset{\begin{smallmatrix}  H \\  | \end{smallmatrix}}{\mathop{C}}\,COOH\]

    A)  2-methylbut-2-enoic acid

    B)  3-methylbut-2-enoic acid

    C)  3-methylbut-3-enoic acid

    D)  2-methylbut-3-enoic acid

    Correct Answer: B

    Solution :

     \[\underset{3-methylbut-2-enoic\text{ }acid}{\mathop{{{H}_{3}}\overset{4}{\mathop{C}}\,-\overset{\begin{smallmatrix}  C{{H}_{3}} \\  4| \end{smallmatrix}}{\mathop{C}}\,=\overset{\begin{smallmatrix}  H \\  2| \end{smallmatrix}}{\mathop{C}}\,-\overset{1}{\mathop{C}}\,OOH}}\,\] [\[\because \]Order of preference: COOH > (=) > alkyl group.]


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