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The packing fraction for a body centred cube is

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a
0.54
b
0.76
c
0.68
d
0.86

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detailed solution

Correct option is C

 

Unit cellNumber of atoms atNo. of atoms
per unit cell
Volume occupied
by particles (%)
 Corners CentresFaces 
 Simple cube8×1​/8=1  0 0 1 52.4
 Body centred cube (BCC) 8×1/8​=1 1 0 2 68
 Face centred cube (FCC) 8×1/8​=1 0 6×1/2​=3 4 74

 

 

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