JEE Main & Advanced Chemistry Hydrocarbons / हाइड्रोकार्बन Question Bank Alkane

  • question_answer
    Which of the following reactions will not give propane [DPMT 2005]

    A) \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}Cl\underset{{{H}_{2}}O}{\mathop{\xrightarrow{Mg/\text{ether}}}}\,\]

    B) \[C{{H}_{3}}COCl\underset{{{H}_{2}}O}{\mathop{\xrightarrow{C{{H}_{3}}MgX}}}\,\]

    C) \[C{{H}_{3}}CH=C{{H}_{2}}\underset{C{{H}_{3}}COOH}{\mathop{\xrightarrow{{{B}_{2}}{{H}_{6}}}}}\,\]

    D) \[\underset{OH\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}CH-C{{H}_{3}}}}\,}}\,\xrightarrow{P/HI}\]

    Correct Answer: B

    Solution :

               With calculated amount of Grignard reagent, acetyl chloride forms ketones. \[C{{H}_{3}}COCl+XMgC{{H}_{3}}\to C{{H}_{3}}COC{{H}_{3}}+Mg<\begin{matrix}    Cl  \\    X  \\ \end{matrix}\]


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