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AMU Medical AMU Solved Paper-2008

  • question_answer
    Out of the two compounds shown below, the vapour pressure of B at a particular temperature is expected to be                

    A)  higher than that of A

    B)  lower than that of B

    C)  same as that of A

    D)  can be higher or lower depending upon the size of the vessel

    Correct Answer: A

    Solution :

                     Due to intramolecular H?bonding in o-nitrophenol it exists as a monomer, while due   to intermolecular H-bonding in p-nitrophenol it exists as an associate molecule. As a result, vapour pressure of a o-nitrophenol is higher than that of p-nitrophenol.


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