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The Solid State — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryThe Solid State1 Mark
MCQ
In which pair most efficient packing in present?
  • A
    $\text{Hcp}$ and $\text{bcc}$
  • ✓
    $\text{Hcp}$ and $\text{ccp}$
  • C
    $\text{Bcc}$ and $\text{ccp}$
  • D
    $\text{Bcc}$ and simple cubic cell
✓

Answer

Correct option: B.
$\text{Hcp}$ and $\text{ccp}$
The packing efficiency of the lattices are given below.
$\text{hcp} = 74\%$
$\text{ccp} = 74\%$
$\text{bcc} = 68\%$
Simple cubic $= 54\%.$
So, the pair with most efficient packing is $\text{hcp}$ and $\text{ccp}.$

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