JEE CHEMISTRY MCQ: SOLID STATE

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A compound alloy of gold and

Cu

crystallises in a cubic lattice in which the gold atoms occupy the lattice points at the corners of a cube and the copper atoms occupy the centres of each of the cube faces. What is the empirical formula of this compound?

View answer and explanation

Correct option: A

\mathrm{AuC}{\mathrm{u}_3}

The correct answer is A (

\mathrm{AuC}{\mathrm{u}_3}

) because the gold atoms at the corners contribute 1 atom per unit cell, and the copper atoms at the face centers contribute 3 atoms per unit cell.

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\mathrm{d}_{\mathrm{e}}

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