JEE Main & Advanced Chemistry Hydrocarbons / हाइड्रोकार्बन Question Bank Alkyne

  • question_answer
    Identify the product D in the following series of reaction \[C{{H}_{3}}COOH\xrightarrow{LiAl{{H}_{4}}}A\underset{443K}{\mathop{\xrightarrow{{{H}^{+}}}}}\,B\xrightarrow{B{{r}_{2}}}C\underset{KOH}{\mathop{\xrightarrow{alc.}}}\,D\] [CBSE PMT 1998] Methane

    A)

    B) Alcohol

    C) Acetylene

    D) Benzaldehyde

    Correct Answer: C

    Solution :

               \[C{{H}_{3}}-COOH\xrightarrow{LiAl{{H}_{4}}}C{{H}_{3}}-C{{H}_{2}}-OH\underset{443\,K}{\mathop{\xrightarrow{{{H}^{+}}}}}\,\] \[C{{H}_{2}}=C{{H}_{2}}\xrightarrow{B{{r}_{2}}}\underset{\underset{Br\,\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{2}}}}\,-\underset{\underset{Br\,\,}{\mathop{|\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{2}}}}\,\underset{KOH}{\mathop{\xrightarrow{alc.}}}\,\] \[\underset{\text{Acetylene}}{\mathop{CH\equiv CH}}\,+2KBr+2{{H}_{2}}O\]


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