# NEET Chemistry The Solid State Questions Solved

An alloy of copper, silver and gold is found to have copper constituting the ccp lattice. If silver atoms occupy the edge centres and gold is present at body centre, the alloy has a formula-

(A) $C{u}_{4}A{g}_{2}Au$

(B) $C{u}_{4}A{g}_{4}Au$

(C) $C{u}_{4}A{g}_{3}Au$

(D) $CuAgAu$

(C). ccp lattice = fcc lattice

${Z}_{Ag}=12×\frac{1}{4}=3$

(Each edge centered atom is contributed by 4 unit cell)

${Z}_{Au}=1$

Difficulty Level:

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