NEET Chemistry NEET PYQ-IUPAC and Isomerism

  • question_answer
    The incorrect IUPAC name is:       [AIPMT 2001]

    A) \[\underset{\text{2, methyl-3-butanone}}{\mathop{C{{H}_{3}}-\underset{\begin{smallmatrix}  || \\  O \end{smallmatrix}}{\mathop{C}}\,-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}}}}\,\]

    B) \[\underset{\text{2, 3-dimethyl pentane}}{\mathop{C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-\underset{\begin{smallmatrix}  | \\  C{{H}_{2}}-C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}}}}\,\]

    C) \[\underset{\text{4-methyl-2-pentyne}}{\mathop{C{{H}_{3}}-C\equiv CCH{{(C{{H}_{3}})}_{2}}}}\,\]

    D) \[\underset{\text{2-bromo-3-chlorobutane}}{\mathop{C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  Cl \end{smallmatrix}}{\mathop{CH}}\,-\underset{\begin{smallmatrix}  | \\  Br \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}}}}\,\]

    Correct Answer: A

    Solution :

    [a]             Correct name is 3-methyl -2-butanone.


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