A) \[PQ{{\,}_{2}}\]
B) \[{{P}_{2}}Q\]
C) PQ
D) \[{{P}_{2}}{{Q}_{2}}\]
Correct Answer: A
Solution :
Four atoms P contributes to one unit cell from ccp arrangement and 4 atoms Q from the all octahedral voids and 4 atoms Q from the half of the tetrahedral void contributes one unit cell. So, formula of solid is \[{{P}_{4}}{{Q}_{8}}\] so, the simplest formula of the solid is \[P{{Q}_{2}}\].
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