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JEE Main & Advanced Chemistry The Solid State / ठोस प्रावस्था Question Bank Mathematical analysis of cubic system and Bragg's equation

  • question_answer
    In orthorhombic, the value of \[a,\,b\] and \[c\] are respectively \[4.2{AA},\,8.6{AA}\] and \[8.3{AA}\]. given the molecular mass of the solute is \[155\,gm\,mo{{l}^{-1}}\] and that of density is \[3.3\,gm/cc\], the number of formula units per unit cell is [Orrisa JEE 2005]

    A) 2             

    B) 3

    C) 4             

    D) 6

    Correct Answer: C

    Solution :

    \[Z=\frac{V\times {{N}_{0}}\times d}{M}\]                                 \[=\frac{4.2\times 8.6\times 8.3\times {{10}^{-24}}\times 6.023\times {{10}^{23}}\times 3.3}{155}\]\[=3.84=4\]


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