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Question: Answered & Verified by Expert
The ratio of effective number of atoms in a unit cell of fcc and bcc lattices is
ChemistrySolid StateAP EAMCETAP EAMCET 2022 (07 Jul Shift 1)
Options:
  • A $1: 2$
  • B $4: 1$
  • C $1: 4$
  • D $2: 1$
Solution:
1099 Upvotes Verified Answer
The correct answer is: $2: 1$
The face-centered cubic (fcc) contains 4 atoms per unit cell while bccc (body-centered cubic) lattices contains 2 atoms per unit cell.
$\frac{\text { Effective number of atoms in fcc }}{\text { Effective number of atoms in bcc }}=\frac{4}{2}=2: 1$

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