Solid StateHard

Question

In a face centerd lattice of X and Y, X atoms are present at the corners while Y atoms are at face centers. Then the formula of the compound would be if two atoms of X are missing from the corners :

Options

A.X4Y
B.X3Y4
C.XY4
D.X2Y4

Solution

for X, 6 ×
for Y, 6 × = 3
So    X3/4 Y3    or     X3  Y12    or     XY4

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