JEE Main & Advanced Chemistry Hydrocarbons / हाइड्रोकार्बन Question Bank Alkene

  • question_answer
    Alkene \[R-C-H=C{{H}_{2}}\] reacts readily with \[{{B}_{2}}{{H}_{56}}\] and the product on oxidation with alkaline hydrogen peroxides produces [CBSE PMT 1995]

    A) \[R-C{{H}_{2}}-CHO\]

    B) \[R-C{{H}_{2}}-C{{H}_{2}}-OH\]

    C) \[\underset{O}{\mathop{\underset{||}{\mathop{R-C-C{{H}_{3}}}}\,}}\,\]

    D) \[\underset{\,\,\,\,\,\,OH\,\,\,\,OH}{\mathop{\underset{\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}{\mathop{R-CH-C{{H}_{3}}}}\,}}\,\]

    Correct Answer: B

    Solution :

    \[3R-CH=C{{H}_{2}}+\frac{1}{2}{{B}_{2}}{{H}_{6}}\underset{\text{Ether}}{\mathop{\xrightarrow{\text{Dry}}}}\,\,{{(R-C{{H}_{2}}C{{H}_{2}})}_{3}}B\]\[\overset{\begin{matrix}    {}  \\    {}  \\ \end{matrix}}{\mathop{\underset{\text{Alcohol}}{\mathop{3R-C{{H}_{2}}C{{H}_{2}}OH}}\,}}\,\]


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