1.

Percentage of free space in cubic close packed struchure and in body centred structure are respectively.A. `30%` and `26%`B. `26%` and 32%`C. `32%` and `48%`D. `48%` and `26%`

Answer» Correct Answer - B
Packing fraction of cubic close packing and body centred packing are `0.74` and `0.68` respectively. So, vacant space is `26%` and `32%` respectively.


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