Solid State Class 12 MCQ on Topic- Packing Efficiency
Q.The percentage of total space which is covered by the particles is known as
- Coordination number
- Packing fraction
- Packing efficiency
- Closed packing
Packing efficiency
Q.The number of closest neighbour of any constituent particle is
- Coordination number
- Packing
- Packing efficiency
- None
Coordination number
Q. Coordination number in square close packed structure is
- 1
- 2
- 4
- 12
4
Q.Coordination number in 2D- HCP structure is
- 4
- 8
- 6
- 12
6
Q.ABABA…. Arrangement is found in
- HCP packing
- CCP packing
- Square packing
- BCC packing
HCP packing
Q.AAAAA ….. arrangement is found in
- HCP packing
- CCP packing
- Square packing
- BCC packing
Square packing
Q.ABCABC….. arrangement is found in
- HCP packing
- CCP packing
- Square packing
- BCC packing
CCP packing
Q.A horizontal row is formed in
- One dimension packing
- Two dimension packing
- Three dimension packing
- None
Q.A square and hexagon is formed in
- One dimension packing
- Two dimension packing
- Three dimension packing
- None
Two dimension packing
Q.First two layer are similar in
- One dimension packing
- Two dimension packing
- Three dimension packing
- None
Three dimension packing
Q.Voids present in HCP or CCP arrangement are
- Trigonal
- Tetrahedral
- Octahedral
- Both octahedral & tetrahedral
Both octahedral & tetrahedral
Q.Number of sphere is equal to number of
- Trigonal
- Tetrahedral
- Octahedral
- Both octahedral & tetrahedral
Octahedral voids
Q.Number of tetrahedral voids is equal to
- Double of octahedral number
- Triple of tetrahedral number
- Number of sphere
- Both 1 & 2
Double of octahedral number
Q.Packing efficiency for face centred unit cell is
- 52%
- 68%
- 72%
- 74%
74%
Q.Packing efficiency for body centred unit cell is
- 52%
- 68%
- 72%
- 74%
68%
Q.The ratio of close packed atoms to tetrahedral hole in cubic close packing is
- 1:1
- 1:2
- 1:3
- 1:4
1:2
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