J & K CET Medical J & K - CET Medical Solved Paper-2005

  • question_answer
    Which of the following is most volatile?

    A) \[HF\]                                  

    B) \[HCl\]

    C)  \[HBr\]                               

    D) \[HI\]

    Correct Answer: D

    Solution :

                    The bond strength of\[HX\]decreases from HF to fil because the dissociation energy of \[HX\]bond decreases from\[HF\]to\[HI\]. \[\begin{align}   & Hydrogen\text{ }halide~:\text{ }\,\,\,\,HF\text{ }\,\,\,HCl\,\,\,\,\text{ }HBr\,\,\,\,\text{ }HI \\  & Dissociation\text{ }energy:\text{ }566~~\,\,\,\,\,\,\,\,\,\,\,\,\,\,431\text{ }\,\,\,\,\,\,\,\,\,\,366\text{ }\,\,\,\,\,\,299 \\ \end{align}\] \[(kJ\,mo{{l}^{-1}})\]


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