CMC Medical CMC-Medical VELLORE Solved Paper-2015

  • question_answer
    What will be the correct order of basicity of fluoride?

    A)  \[Xe{{F}_{6}}>Xe{{F}_{4}}>Xe{{F}_{2}}\]

    B)  \[Xe{{F}_{2}}>Xe{{F}_{4}}>Xe{{F}_{6}}\]

    C)  \[Xe{{F}_{2}}>Xe{{F}_{4}}<Xe{{F}_{6}}\]

    D)  \[Xe{{F}_{2}}=Xe{{F}_{4}}<Xe{{F}_{6}}\]

    E)  \[Xe{{F}_{2}}>Xe{{F}_{4}}=Xe{{F}_{6}}\]

    Correct Answer: C

    Solution :

                    Due to the availability of electron on \[Xe\,(c)\]\[Xe{{F}_{2}}>Xe{{F}_{4}}>Xe{{F}_{6}}\]is the correct order of basicity. \[Xe{{F}_{6}}\to \] one lone pair \[Xe{{F}_{4}}\to \] two lone pairs \[Xe{{F}_{2}}\to \] three lone pairs


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