Solid State

Which is incorrect statement ?

• In NaCl structure, tetrahedral voids are unoccupied

• In ZnS structure, octahedral voids are unoccupied

• In CaF2, structure, all tetrahedral voids are occupied

• In Na2O structure, all tetrahedral voids are unoccupied

• a

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• a

• b

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• a

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• a

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• a

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• d

• a

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• a

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• a

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• a

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• d