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JEE Main & Advanced Chemistry The Solid State / ठोस प्रावस्था Question Bank Crystal structure and Coordination number

  • question_answer
    A compound is formed by elements \[A\]and \[B.\] This crystallizes in the cubic structure when atoms \[A\]are the corners of the cube and atoms \[B\] are at the centre of the body. The simplest formula of the compounds is [KCET 1993; CBSE PMT 2000; Kerala PMT 2002]

    A) \[AB\]  

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

    C) \[{{A}_{2}}B\]   

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

    Correct Answer: A

    Solution :

    A atoms are at eight corners of the cube. Therefore, the number of A atoms in the unit cell \[=\frac{8}{8}=1\], atoms B per unit cell = 1. Hence the formula is AB.


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