BCECE Medical BCECE Medical Solved Papers-2014

  • question_answer
    What is Z in the following reactions? \[BC{{l}_{3}}+{{H}_{2}}\xrightarrow[{{450}^{o}}C]{Cu-Al}X+HCl\] \[X\xrightarrow{methylation}Z\]

    A)  \[(C{{H}_{3}})B{{H}_{2}}\]         

    B)  \[{{(C{{H}_{3}})}_{4}}{{B}_{2}}{{H}_{2}}\]

    C)  \[{{(C{{H}_{3}})}_{3}}{{B}_{2}}{{H}_{3}}\]

    D)  \[{{(C{{H}_{3}})}_{6}}{{B}_{2}}\]

    Correct Answer: B

    Solution :

    \[BC{{l}_{3}}+{{H}_{2}}\xrightarrow[{{450}^{o}}C]{Cu-Al}\,\underset{diborane}{\mathop{{{B}_{2}}{{H}_{6}}}}\,+HCl\] \[\underset{X}{\mathop{{{B}_{2}}{{H}_{6}}}}\,+4C{{H}_{3}}Cl\xrightarrow{Methylation}\underset{Z}{\mathop{{{(C{{H}_{3}})}_{4}}{{B}_{2}}{{H}_{2}}}}\,\]


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