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12th Class Chemistry The Solid State / ठोस प्रावस्था Question Bank 12th CBSE Chemistry The Solid State

  • question_answer
    \[AgI\] crystallizes in a cubic close-packed ZnS structure. What fraction of tetrahedral sites is occupied by\[A{{g}^{+}}\]ions?

    Answer:

                    In the face centered unit cell of \[AgI,\] there are four \[A{{g}^{+}}\] ions and four \[{{I}^{-}}\] ions. As there are four \[{{I}^{-}}\] ions in the packing, therefore there are eight tetrahedral voids. Half of these are occupied by \[A{{g}^{+}}\] ions.


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