A crystalline solid `XY_(3)` has ccp arrangement for its element Y. The element X occupies :
A. `66%` of tetrahedral holes
B. `33%` of tetrahedral holes
C. `66%` of octahedral holes
D. `33%` of octahedral holes

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Correct Answer - D
The ratio of X and Y is `1:3`
`:.` X will occupy `1//3` rd of octahedral voids
`:.%` of octahedral voids occupied by X
`=1/3xx100=33.3%`

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