Percentage of free space in cubic in a body- centred cubic unit cell i

1.	Percentage of free space in cubic in a body- centred cubic unit cell is .A. 74B. 68C. 32D. 26
Answer» Correct Answer - C packing efficiency for bcc arrangement is 68 % which represents total filled space in the unit cell hence empty space in body centred arrangement is 10-68 = 32 % note :- here ,empty space in bcc arrangement is asked therefore empty space in any crystal packing can be empty space in unit cell =100- packing efficiency

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Percentage of free space in cubic in a body- centred cubic unit cell is .A. 74B. 68C. 32D. 26

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