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CMC Medical CMC-Medical Ludhiana Solved Paper-2011

  • 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 \[H-X\] decreases from HF to HI because the dissociation energy of \[H-X\]bond decreases from HP to HI. Hydrogen halide   : \[H-F\] \[H-Cl\] \[HBr\] \[HI\] Dissociation energy: 566      431      366    299 \[(kJ\,mo{{l}^{-1}})\]


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