A) \[1.48\overset{\text{o}}{\mathop{\text{A}}}\,\]
B) \[2.43\overset{\text{o}}{\mathop{\text{A}}}\,\]
C) \[1.51\overset{\text{o}}{\mathop{\text{A}}}\,\]
D) \[1.86\overset{\text{o}}{\mathop{\text{A}}}\,\]
Correct Answer: D
Solution :
For a body centred cubic lattice, the radius of atom, \[r=\frac{\sqrt{3}}{4}.a\] \[a=4.29\overset{\text{o}}{\mathop{\text{A}}}\,\] \[\therefore \] \[r=\frac{\sqrt{3}}{4}\times 4.29\] \[r=1.86\overset{\text{o}}{\mathop{\text{A}}}\,\]
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