RAJASTHAN ­ PET Rajasthan PET Solved Paper-2003

  • question_answer
    2-chloropropane reacts with sodium in presence of ether to form

    A)  n-hexane

    B)  n-hexene

    C)  \[C{{H}_{3}}-CH=C{{H}_{2}}\]

    D)  \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,=C{{H}_{3}}\]

    Correct Answer: D

    Solution :

     \[\underset{2\text{ }-chloro\text{ }propane}{\mathop{C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  Cl \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}}}}\,+Na+C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  Cl \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}}\] \[\xrightarrow[{}]{dry\,ether}\underset{2,3-dimethyl\text{ }butane}{\mathop{C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}}}}\,+2NaCl\]


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