A compound formed by elements X and Y crystallizes in a cubic structure where X is the at corners of the cube and Y is at six face centres. What is the formula of the compound?
A
XY
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B
XY2
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C
XY3
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D
XY4
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Solution
The correct option is BXY3 Given that a compound is formed by elements X and Y. Since X atoms are at the corners, number of atoms of X =18×8=1 Since Y is at face centres, number of atoms of Y =12×6=3 Hence, the formula is XY3.