Manipal Medical Manipal Medical Solved Paper-2014

  • question_answer
    Arrange the following in increasing order of their heat of hydrogenation (\[-\Delta H\]).

    A) I < II < III < IV                        

    B) IV < III < II < I

    C) IV < III < I < II                        

    D) I < II < IV < III

    Correct Answer: A

    Solution :

    Stability of alkene is inversely proportional to their heat of hydrogenation (\[-\Delta H\]). I Is most stable as it is tetra substituted as well as conjugated. IV has least substituted double bond.                   


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