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Which of the following statements are correct : (A) The coordination number of each type of ion in CsCl is 8. (B) A metal that crystallises in BCC structure has a coordination number 12. (C) A unit cell of an ionic crystal shares some of its ions with other unit cells (D) The length of the unit cell in NaCl is 552 pm.[r_(Na^(+))=95pm,r_(cl^(-))=181pm] |
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Answer» SOLUTION :`r_(+) + r_(–) = a//2` (95 + 181)=` a//2` `implies a = 276 x× 2` a = 552 pm. |
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