1.

A crystalline solid XY_3 has ccp arrangement for its element Y. X occupies

Answer»

66% of tetrahedral VOIDS
33% of tetrahedral voids
66% of OCTAHEDRAL voids
33% of octahedral voids.

Solution :As RATIO of X and Y is 1:3 , X will OCCUPY `1/3` rd of octahedral voids.
`:.` % of octahedral voids occupied by X `= 1/3 XX 100= 33.3%`


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