CMC Medical CMC-Medical Ludhiana Solved Paper-2010

  • question_answer
    Which of the following can be used for the preparation of propane?

    A)  \[C{{H}_{3}}CH=C{{H}_{2}}\xrightarrow[2.\,\,AgN{{O}_{3}}/NaOH]{1.\,\,{{B}_{2}}{{H}_{6}}}\]

    B)  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}Cl\xrightarrow[2.\,{{H}_{2}}{{O}_{2}}]{1.\,Mg/ether}\]

    C)  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}I\xrightarrow[{}]{HI/\Delta 150{}^\circ C}\]

    D)  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}COONa\xrightarrow[\Delta ]{NaOH(CaO)}\]

    Correct Answer: C

    Solution :

                    Alkyl halides undergo reduction with red phosphorus and hydrogen iodide and result in the formation of alkane. \[\underset{propyl\,\,iodide}{\mathop{C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}I}}\,\xrightarrow[150{}^\circ C]{\operatorname{Re}d\,P/HI}\underset{propane}{\mathop{C{{H}_{3}}C{{H}_{2}}C{{H}_{3}}}}\,\]


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