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A solid is made up of two elements P and...

A solid is made up of two elements P and Q , Atoms Q are in ccp arrangement while atoms P occupy all the tetrahdral sites. What is the formual of the compound ?

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The correct Answer is:
`P_2Q`
Suppose number of atoms Q=n
Then number of tetrahedral sites =2 n
`therefore` Number of atoms P=2n
`therefore` Ratio P:Q=2n:n =2 :1 , i.e., formula is `P_2Q`
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