JEE Main & Advanced Chemistry Hydrocarbons Question Bank Critical Thinking

  • question_answer
    The reaction \[C{{H}_{3}}CH=C{{H}_{2}}\underset{{{H}^{^{+}}}}{\mathop{\xrightarrow{(CO+{{H}_{2}})}}}\,C{{H}_{3}}-\underset{COOH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CH-C{{H}_{3}}}}\,\,\,\,\,\,}}\,\,\,\] is known as [MP PMT 2002]

    A) Wurtz reaction

    B) Koch reaction

    C) Clemmensen reduction

    D) Kolbe?s reaction

    Correct Answer: B

    Solution :

    Koch reaction : (Carboxylation of Alkene) \[C{{H}_{3}}-CH=C{{H}_{2}}\underset{{{400}^{o}}C,\,{{H}_{3}}P{{O}_{4}}}{\mathop{\xrightarrow{\text{Water gas (}CO+{{H}_{2}})}}}\,\underset{\text{Isobutyric acid}}{\mathop{C{{H}_{3}}-\overset{COOH}{\mathop{\overset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CH\,\,\,-}}\,}}\,C{{H}_{3}}}}\,\]


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