JCECE Engineering JCECE Engineering Solved Paper-2015

  • question_answer
    In the reaction,\[C{{H}_{3}}COOH\xrightarrow{LiAl{{H}_{4}}}A\xrightarrow{PC{{l}_{5}}}B\xrightarrow{Alc.\,\,KOH}C\]the product is

    A)  acetaldehyde

    B)  acetylene

    C)  ethylene

    D)   acetylchloride

    Correct Answer: C

    Solution :

    \[\underset{Acetic\,\,acid}{\mathop{C{{H}_{3}}COOH}}\,\xrightarrow{LiAl{{H}_{4}}}\underset{\begin{smallmatrix}  Ethanol \\  (A) \end{smallmatrix}}{\mathop{C{{H}_{3}}C{{H}_{2}}OH}}\,\xrightarrow{PC{{l}_{5}}}\] \[\begin{align}   & C{{H}_{3}}C{{H}_{2}}Cl+POC{{l}_{3}}+HCl \\  & Ethyl\,\,chloride \\  & \begin{matrix}    \begin{align}   & \text{Elimination} \\  & \operatorname{Reaction} \\ \end{align} & \downarrow  & Alc.\,\,KOH  \\ \end{matrix} \\ \end{align}\]                 \[\underset{\begin{smallmatrix}  Ethylene\,\,chloride \\  (C) \end{smallmatrix}}{\mathop{C{{H}_{2}}=C{{H}_{2}}}}\,\]


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