RAJASTHAN ­ PET Rajasthan PET Solved Paper-2002

  • question_answer
    \[C{{H}_{3}}-\underset{\begin{smallmatrix}  || \\  O \end{smallmatrix}}{\mathop{C}}\,-Cl+KCN\to C{{H}_{3}}-\underset{\begin{smallmatrix}  || \\  O \end{smallmatrix}}{\mathop{C}}\,-CN\xrightarrow[{}]{{{H}_{2}}O}X\] Here X will be

    A)  \[C{{H}_{3}}-\underset{\begin{smallmatrix}  || \\  O \end{smallmatrix}}{\mathop{C}}\,-COOH\]

    B)  \[C{{H}_{3}}-C{{H}_{2}}-COOH\]

    C)  \[C{{H}_{3}}COOH\]      

    D)  None of these

    Correct Answer: A

    Solution :

     \[\underset{acetyl\text{ }chloride}{\mathop{C{{H}_{3}}-\underset{\begin{smallmatrix}  || \\  O \end{smallmatrix}}{\mathop{C}}\,-Cl}}\,+KCN\xrightarrow[{}]{{}}C{{H}_{3}}-\underset{\begin{smallmatrix}  || \\  O \end{smallmatrix}}{\mathop{C}}\,-CN\] \[\xrightarrow[{}]{{{H}_{2}}O}\underset{pyruvic\text{ }acid}{\mathop{C{{H}_{3}}-\underset{\begin{smallmatrix}  || \\  O \end{smallmatrix}}{\mathop{C}}\,-COOH}}\,\]


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