Published by:
CGP EDU Academic Team
Published on: August 14, 2026
In two dimension, there are square close packing & Hexagonal close packing. In three dimension, however threre are HCP, BCC and CCP arrangement.
Unoccupied space in packing is known as void which may be octahedral, tetrahedral or cubic void and formation of void depends on atomic or ionic
arrangment in crystal.
(i) Empty space left in HCP in three dimension is –
A
76% 
cubic < tetrahedral void < octahedral void M 2 O 2
cubic < tetrahedral void < octahedral void M 2 O 2
B
74% 
cubic > tetrahedral void > octahedral void MO 2
cubic > tetrahedral void > octahedral void MO 2
C
68% 
cubic = tetrahedral void = octahedral void M 2 O 1
cubic = tetrahedral void = octahedral void M 2 O 1
D
26% (ii) In ccp, ratio of no. of atoms to no. of tetrahedral void is – 
(iii) Size order of octahedral, tetrahedral & cubic void is – cubic > octahedral void > tetrahedral void (iv) In certain metallic oxide, metal M occupy HCP lattice & O –2 occupy 
rd of octahedral void, formula of crystal is – M 3 O 2
(iii) Size order of octahedral, tetrahedral & cubic void is – cubic > octahedral void > tetrahedral void (iv) In certain metallic oxide, metal M occupy HCP lattice & O –2 occupy rd of octahedral void, formula of crystal is – M 3 O 2
Text Solution
Verified by ExpertsThe correct answer is:
26
(i)
Sol. 26%
(ii)
Sol. 
(iii)
Sol. cubic > octahedral void > tetrahedral void
(iv)
Sol. M 3 O 2
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems