Question

Close packing is maximum in the crystal lattice of:

• A. simple cubic
• B. face-centred
• C. body-centred
• D. hexagonal closed packing

Answer 1

Answer: (B), (D)

hexagonal closed packing
face-centred

The space occupied in sc, bcc and fcc and hcp structures are $52\%$, $68\%,74\%$ and 74% respectively. Hence, the close packing is maximum in the crystal lattice of face centred cubic and hexagonal close packing.

Hence, the correct options are $\text{B}$ and $\text{D}$