The Solid State - Result Question 22
####22. Percentage of free space in a body centred cubic unit cell is :
(a) $30 %$
(b) $32 %$
(c) $34 %$
(d) $28 %$
[2008]
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Solution:
- (b) Percentage of occupied space in a $b c c$ is $68 %$.
$\therefore \quad$ Percentage of free space in a $b c c$ is
$ (100-68)=32 % $