A) \[C{{u}_{4}}A{{g}_{4}}Au\]
B) \[C{{u}_{4}}A{{g}_{2}}Au\]
C) \[Au\,Ag\,Cu\]
D) \[C{{u}_{4}}A{{g}_{3}}Au\]
Correct Answer: D
Solution :
Cu atoms forming ccp lattice \[\therefore \] No. of Cu atom \[=\frac{1}{8}\times 8\] (at corner) \[+\frac{1}{2}\,\times 6\] (at face) \[=1+3=4\] No. ofAg atom at edge of ccp \[=\frac{1}{4}\,\times 12=3\] No. of Au atom at centre of cop \[=1\times 1=1\] \[\therefore \] Formula of alloy \[C{{u}_{4}}A{{g}_{3}}Au\].
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