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Home  >>  AIMS  >>  Class12  >>  Chemistry  >>  Solid State
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The density of CaO is $3.35 gm/cm^3$. The oxide crystallises in one of the cubic systems with an edge of 4.80 $A^{\large\circ}$. How many $Ca^{++ }$ ions and $O^{–2}$ ions belong to each unit cell, and which type of cubic system is present?

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No of $Ca^{++}$ion=4,No of $O^{--}$ion=4,fcc
Hence (A) is the correct answer.
answered Jun 4, 2014 by sreemathi.v

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