Question

Atoms of element y form hcp lattice and those of the

element x occupy 1

3 ⁄ of tetrahydral voids. What is the

formula of the compound formed by the elements x and y?

(A) X4Y3 (B) X3Y4 (C) X3Y2 (D) X2Y3​

Answer 1

Answer:

(C) X3Y2

Explanation:

HCP contains 6 atoms per unit cell.

Tetrahedral void = 2n (here n=6)

Tetrahedral void= 12

X = 6

Y = 12/3 = 4

Formula = X6Y4 or X3Y2