Question

In a compound, atoms of element Y form ccp lattice and those of element X occupy 2/3rd of tetrahedral voids. The formula of the compound will be
(a) X₄Y₃
(b) X₂Y₃
(c) X₂Y
(d) X₃Y₄

Answer 1

Number of atoms of Y = N = 4

Number of atoms of X = 23×2N=23×8=163

∴ Formula of the compound will be X4Y3

Hence answer is (a)

Answer 2

let the number of atom of element B in CCP be x

then number of tetrahedral voids is equal to 2x

option is A correct