Q26 / 90 · KVPY 2017 (19 Nov SB/SX) · Chemistry

The packing efficiency in a body-centred cubic (bcc) structure is closet to

  • A
    $74 \%$
  • B
    $63 \%$
  • Correct answer
    C
    $68 \%$
  • D
    $52 \%$

Solution

$\eta=\frac{2 \times 4 / 3 \pi R^{3}}{\left(\frac{4 \mathrm{R}}{\sqrt{3}}\right)^{3}} \times 100 \cong 68 \%$

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

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