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Solid state 12th chemistry |
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Answer» Answer: ACCORDING to the formula MgAl2O4, if there are 4 OXIDE ions, there will be 1Mg2+ ion and 2Al3+ ions. But if the 4O2− ions are in ccp arrangement, there will be 4 octahedral voids and 8 tetrahedral voids. Thus, 1Mg2+ ions is PRESENT in one of 8 tetrahedral voids ∴ % of tetrahedral voids occupied by Mg2+=18×100=12.5% Similarly, 2Al3+ ions are present in two octahedral voids out of 4 available ∴ % of octahedral voids occupied by Al3+=24×100=50% Explanation: |
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