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NEET Chemistry The Solid State / ठोस प्रावस्था Question Bank Self Evaluation Test - The Solid State

  • question_answer
    In a solid 'AB' having the \[NaCl\]structure, 'A' atoms occupy the corners of the cubic unit cell. If all the face-centered atoms along one of the axes are removed, then the resultant stoichiometry of the solid is            

    A) \[A{{B}_{2}}\]                         

    B) \[{{A}_{2}}B\]

    C) \[{{A}_{4}}{{B}_{3}}\]                       

    D) \[{{A}_{3}}{{B}_{4}}\]

    Correct Answer: D

    Solution :

    [d] Effective number of 'A' atoms \[=\left( 8\times \frac{1}{8} \right)+\left( 4\times \frac{1}{2} \right)=3\] Effective number of 'B' atoms \[=\left( 12\times \frac{1}{4} \right)+1=4\] \[\therefore \] Formula of the solid \[={{A}_{3}}{{B}_{4}}\].


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