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WorksheetsSolid States
Total questions: 15
Worksheet time: 11mins
Structure of a mixed oxide is ccp. Cubic unit cell of mixed oxide is composed of oxide ions.
One Fourth of tetrahedral voids are occupied by divalent metal A and all the octahedral voids
are occupied by monovalent metal B. Formula of oxide is.
A2B3O4
AB2O2
ABO2
A2BO2
In face centred cubic lattice, A occupies corners and B occupies face centres. If one atoms of
B is missing from one of the face centre, formula of the compound is.
AB2
A2B2
A2B5
A2B
No. of tetrahedral voids in the unit cell of a face centred cubic lattice of similar atoms is.
4
6
8
12
The number of atoms in 100 g of a face crystal with density = 10 g/cm and cell edge equal to
200 pm is equal to.
5x1024
5x1025
6x1023
2x1025
Percentages of free space in cubic close packed structure and in body centred packed
structure are respectively.
48% and 36 %
32% and 48 %
30% and 26 %
26% and 32 %
Copper crystallizes in fcc with a unit cell length of 361 pm. What is the radius of copper
atom?
108 pm
127 pm
157 pm
181 pm
Schottky defect in crystals is observed
when unequal number of cations and anions are missing from the lattice.
when equal number of cations and anions are missing from the lattice.
when an ion leaves its normal site and occupies an interstitial site.
when the density of the crystal is increased.
The colours of some otherwise colourless compounds are due to.
Metal deficiency defect
Schottky defect
Frenkel defect
Metal excess defect (F-Centres)
Crystal with metal deficiency defect is.
FeO
NaCl
ZnO
KCl
Which among the following is not an example of amorphous solids?
Quartz
Glass
Coke
Plastic
Amorphous solids are also known as.
True solids
Pseudo solids
Poly crystalline solids
None of these
Which among the following is not true for crystalline solid?
They do not show long range order
They show anisotropy
They have sharp melting point
They are also called true solids
Which type of solid conduct electricity in molten state but not in solid
state?
Metallic
Covalent
Ionic
Network
Which of the following lattices has the highest packing efficiency?
Hexagonal close packed
Simple cubic
Body centered cubic
Primitive cubic
A
B
C
D
