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  • Solve it, An alloy of Cu , Ag and Au is found to have copper constituting the face lattice. If Ag atoms occupy the edge centres and Au is present at body centre , the alloy has formula

An alloy of Cu , Ag and Au is found to have copper constituting the face lattice. If Ag atoms occupy the edge centres and Au is present at body centre , the alloy has formula

  • Option 1)

    Cu4Ag2Au

  • Option 2)

    Cu4Ag4Au

  • Option 3)

    Cu4Ag3Au

  • Option 4)

    CuAgAu

 

Answers (1)

Number\, of\, Cu\,\, atom=8\times \frac{1}{8}+6\times \frac{1}{2}=4

Number\, of\, Ag\,\, atom=12\times \frac{1}{4}=3

Number\, of\, Au\,\, atom=1

Hence formula of compound is Cu4Ag3A4

 

Centered unit cell -

In centered unit cell, constituent particles are present in position other than corners in addition to corners.

- wherein

Three types: face centered, body centered, end centered.

 

 


Option 1)

Cu4Ag2Au

This is incorrect

Option 2)

Cu4Ag4Au

This is incorrect

Option 3)

Cu4Ag3Au

This is correct

Option 4)

CuAgAu

This is incorrect

Posted by

Vakul

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