Percentage of free space in a body centred cubic
unit cell is :
(a) 30% (b) 32%
(c) 34% (d) 28%
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b)32%
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(b) 32%
Explanation:
The percentage of free space in body centered cubic unit cell is 32%.
We know that the packing efficiency of body centered cubic unit cell is 68%.
Therefore, the percentage of free space will be the whole minus the packing efficiency.
= 100 - 68
= 32%.
Hence Option B is the answer.
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