Published by:
CGP EDU Academic Team
Published on: August 12, 2026
Select the correct statements :
A
For CsCl unit cell (edge – length = a), 
B
For NaCl unit cell (edge - length = 
), 
),
C
The void space in a b. c. c. unit cell is 0.68
D
The void space % in a face – centered unit cell is 26 %
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(a, b, c, d)
In bcc structure 
Hence, for CsCl, 
is correct
Since, Nacl crystalise in fcc structure
2rc + ra = edge length of the unit cell
Hence, 
is correct
Since packing fraction of a bcc unit cell is 0.68
void space = 1 - 0.68 = 0.32
is incorrect
In fcc unit cell PF = 74 %
VF = 100 - 74 = 26 %
is correct
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