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:

  1. (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 % $



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