KVPY Sample Paper KVPY Stream-SX Model Paper-31

  • question_answer
    An element X (At. wt = 80 g/mol) having fee structure, calculate no. of unit cells in 8 gm of X:

    A) \[0.4\times {{N}_{A}}\]

    B) \[0.1\times {{N}_{A}}\]

    C) \[4\times {{N}_{A}}\]

    D) None of these

    Correct Answer: D

    Solution :

    Effective no. of atoms in a unit cell = 4
    No. of atoms \[=\frac{8}{80}\times {{N}_{A}}\]
    \[\therefore \] No. of unit cell \[=\frac{{{N}_{A}}}{10}\times \frac{1}{4}\]


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