NCERT Class XII Chemistry
Chapter - The Solid State
Questions with Solutions

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Question : 43
Total: 50
Which of the following lattices has the highest packing efficiency (i) simple cubic (ii) body-centred cubic and (iii) hexagonal close-packed lattice?
Solution:  
(i) Simple cubic - 52%
(ii) Body-centred cubic - 68%
(iii) Hexagonal close-packed - 74%
Hence hcp lattice has the highest packing efficiency.
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