A solid is made of two elements P and Q. Atoms P are in ccp arrangement and atom Q occupy all octahedral voids and half of tetrahedral voids. The simplest formula of the compound is :-
A
PQ4
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B
P2Q
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C
PQ2
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D
PQ
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Solution
The correct option is CPQ2 As we know no of atoms in ccp (Z) is 4 thereforeP=4 and we know no. of octahedral voids are 4 and total tetrahedral voids are 8 but according to question Q occupy all octahedral and half tetrahedral voids, therefore Q=4+4=8, so formula will be P4Q8 or we can write PQ2.