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Question

The correct order of the packing efficiency in different types of nuit cells is ............

(a)  fcc < bcc < simple cubic                (b)  fcc > bcc > simple cubic

(c)  fcc < bcc > simple cubic                  (d)  fcc < bcc > simple cubic


Solution

Answer: (b)

Packing efficiency in different types of nuit cells can be tabulated as

Unit cellPacking efficiencyfcc74%bcc68%Simple cubic52%

Hence, correct oreder is  fcc(74%) > bcc(68%) > simple cubic (52%)

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