AFMC AFMC Solved Paper-2010

  • question_answer
    At room temperature, the eclipsed and staggered forms of ethane cannot be isolated because

    A)  they interconvert rapidly

    B)  both the conformers are equally stable

    C)  the energy difference between the conformers is large

    D)  there is a large energy barrier of rotation about the \[\sigma \] bond

    Correct Answer: A

    Solution :

                     Since, the energy difference between two  conformations of ethane is not so large, so the eclipsed   and   staggered   conformations interconvert rapidly. Thus, it is impossible to isolate these forms at room temperature.


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