CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

An alloy of copper, silver, and gold was found to have copper constituting CCP lattice. If silver atoms occupy the edge centers and gold is present at the body center, the alloy has a formula:


A

CuAgAu

No worries! Weโ€˜ve got your back. Try BYJUโ€˜S free classes today!
B

Cu4Ag2Au

No worries! Weโ€˜ve got your back. Try BYJUโ€˜S free classes today!
C

Cu4Ag3Au

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D

Cu4Ag4Au

No worries! Weโ€˜ve got your back. Try BYJUโ€˜S free classes today!
Open in App
Solution

The correct option is C

Cu4Ag3Au


Explanation for the correct option :

(C) Cu4Ag3Au

  • Copper (Cu) consist of CCP lattice. CCP(cubic closed packed) lattice is an alternative name for FCC(face-centered cubic) lattice. They occupy the corners and the face of a unit cell. Hence, the number of Copper atoms in a unit cell will be: 18ร—8+12ร—6=1+3=4
  • Silver(Ag) atoms in a unit cell occupy edges. A cube consists of 12 edges and each atom shares four edges. Therefore the number of silver atoms will be:14ร—12=3
  • Gold (Au) atoms are present at the center of the body and hence the number of atoms per unit cell will be:1

All together the formula will become: Cu4Ag3Au

Explanation for the incorrect options :

Since, the required formula is Cu4Ag3Au. Therefore, options (A), (B) and (D) stand incorrect.

Hence, the correct option is (C)Cu4Ag3Au


flag
Suggest Corrections
thumbs-up
4
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Bonding in Metal Carbonyls
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon