CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2000

  • question_answer
    Which of the following molecules will have unequal bond lengths?

    A)  \[N{{F}_{3}}\]                  

    B)         \[B{{F}_{3}}\]

    C)  \[P{{F}_{5}}\]                   

    D)         \[S{{F}_{6}}\]

    E)  \[Si{{F}_{4}}\]

    Correct Answer: C

    Solution :

    \[P{{F}_{5}}\]molecule will have unequal bond length. In this geometry the equatorial bonds (2.04 A) are slightly shorter than axial bonds (2.19 A).


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