1.

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

Answer» 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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