AMU Medical AMU Solved Paper-2009

  • question_answer
    Which among the following is not a borane?

    A)  \[{{B}_{2}}{{H}_{6}}\]                                   

    B)  \[{{B}_{3}}{{H}_{6}}\]

    C)  \[{{B}_{4}}{{H}_{10}}\]                 

    D)  None of these

    Correct Answer: B

    Solution :

                     Boranes are the stable covalent hydrides of boron having formula \[{{B}_{n}}{{H}_{n+4}}\] and \[{{B}_{n}}{{H}_{n+6}}\]. \[{{B}_{n}}{{H}_{n+4}}[If\,n=2\,;\,{{B}_{2}}{{H}_{6}}]\] \[{{B}_{n}}{{H}_{n+6}}[If\,n=4\,;\,{{B}_{4}}{{H}_{10}}]\] Thus, \[{{B}_{3}}{{H}_{6}}\] is not a borane.


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