A) \[X{{Y}_{3}}\]
B) \[{{X}_{3}}Y\]
C) XY
D) \[X{{Y}_{2}}\]
Correct Answer: A
Solution :
| [a] In unit cell, X-atoms at the corners |
| \[=\frac{1}{8}\times 8=1\] |
| \[Y-\]atoms at the face centres\[=\frac{1}{2}\times 6=3\] |
| Ratio of X and \[Y=1:3\] |
| Hence, formula is \[X{{Y}_{3}}.\] |
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