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Question

Percentage of free space in cubic close packed structure and in body centred cubic structure are respectively:

A
48% and 26%
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B
30% and 26%
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C
26% and 32%
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D
32% and 48%
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Solution

The correct option is C 26% and 32%
Packing fraction of face centered cubic cell is 74 % and body centered cubic cell is 68 %, So the percentage of free space will be 26% and 32% respectively.

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