Q21 / 160 · AP EAMCET 2022 (07 Jul Shift 1) · Chemistry

The ratio of effective number of atoms in a unit cell of fcc and bcc lattices is

  • A
    $1: 2$
  • B
    $4: 1$
  • C
    $1: 4$
  • Correct answer
    D
    $2: 1$

Solution

The face-centered cubic (fcc) contains 4 atoms per unit cell while bccc (body-centered cubic) lattices contains 2 atoms per unit cell. $\frac{\text { Effective number of atoms in fcc }}{\text { Effective number of atoms in bcc }}=\frac{4}{2}=2: 1$

Hence, the correct answer is option: 'D'.

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