NEET Sample Paper NEET Sample Test Paper-74

  • question_answer
    In a compound, atoms of element Y form CCP lattice and those of element X occupy 2/3rd of tetrahedral voids. The formula of compound will be

    A)  \[{{X}_{3}}{{P}_{4}}\]                      

    B)  \[{{X}_{4}}{{Y}_{3}}\]

    C)  \[{{X}_{2}}{{Y}_{3}}\]                      

    D)  \[{{X}_{2}}Y\]

    Correct Answer: B

    Solution :

    In CCP, total number of atoms = 4 \[\therefore \,\, Total Y atoms = 4\] Total number of tetrahedral voids = 8 \[Total X atoms = \frac{8\times 2}{3}=\frac{16}{3}\] \[Formula\,\,=\,\,{{X}_{16/3}}{{Y}_{4}}={{X}_{16}}{{Y}_{12}}\,\,or\,\,{{X}_{4}}{{Y}_{3}}\]


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