SOLID
STATE EAMCET MCQ’S
1. Which of the following
conditions favours the existence of a substance in the
solid
state?
(i)
High temperature
(ii)
Low temperature
(iii)
High thermal energy
(iv)
Weak cohesive forces
2. Which of the following
is not a characteristic of a crystalline solid?
(i)
Definite and characteristic heat of fusion.
(ii)
Isotropic nature.
(iii)
A regular periodically repeated pattern of arrangement of constituent
particles
in the entire crystal.
(iv)
A true solid
3. Which of the following
is an amorphous solid?
(i)
Graphite (C)
(ii)
Quartz glass (SiO2)
(iii)
Chrome alum
(iv)
Silicon carbide (SiC)
4. Which of the following
is true about the value of refractive index of quartz glass?
(i)
Same in all directions
(ii)
Different in different directions
(iii)
Cannot be measured
(iv)
Always zero
5. Which of the following
statement is not true about amorphous solids?
(i)
On heating they may become crystalline at certain temperature.
(ii)
They may become crystalline on keeping for long time.
(iii)
Amorphous solids can be moulded by heating.
(iv)
They are anisotropic in nature.
6. The sharp melting point
of crystalline solids is due to ___________.
(i)
a regular arrangement of constituent particles observed over a short
distance
in the crystal lattice.
(ii)
a regular arrangement of constituent particles observed over a long
distance
in the crystal lattice.
(iii)
same arrangement of constituent particles in different directions.
(iv)
different arrangement of constituent particles in different directions.
7. Iodine molecules are
held in the crystals lattice by ____________.
(i)
london forces
(ii)
dipole-dipole interactions
(iii)
covalent bonds
(iv)
coulombic forces
8. Which of the following
is a network solid?
(i)
SO2 (Solid)
(ii)
I2
(iii)
Diamond
(iv)
H2O (Ice)
9. Which of the following
solids is not an electrical conductor?
(A)
Mg (s) (B) TiO (s) (C) I2 (s) (D) H2O (s)
(i)
(A) only
(ii)
(B) Only
(iii)
(C) and (D)
(iv)
(B), (C) and (D)
10. Which of the following is not the characteristic of ionic
solids?
(i)
Very low value of electrical conductivity in the molten state.
(ii)
Brittle nature.
(iii)
Very strong forces of interactions.
(iv)
Anisotropic nature.
11. Graphite is a good
conductor of electricity due to the presence of __________.
(i)
lone pair of electrons
(ii)
free valence electrons
(iii)
cations
(iv)
anions
12. Which of the following
oxides behaves as conductor or insulator depending
upon
temperature?
(i)
TiO
(ii)
SiO2
(iii)
TiO3
(iv)
MgO
13. Which of the following
oxides shows electrical properties like metals?
(i)
SiO2
(ii)
MgO
(iii)
SO2(s)
(iv)
CrO2
14. The lattice site in a
pure crystal cannot be occupied by _________.
(i)
molecule
(ii)
ion
(iii)
electron
(iv)
atom
15. Graphite cannot be
classified as __________.
(i)
conducting solid
(ii)
network solid
(iii)
covalent solid
(iv)
ionic solid
16. Cations are present in
the interstitial sites in __________.
(i)
Frenkel defect
(ii)
Schottky defect
(iii)
Vacancy defect
(iv)
Metal deficiency defect
17. Schottky defect is
observed in crystals when __________.
(i)
some cations move from their lattice site to interstitial sites.
(ii)
equal number of cations and anions are missing from the lattice.
(iii)
some lattice sites are occupied by electrons.
(iv)
some impurity is present in the lattice.
18. Which of the following
is true about the charge acquired by p-type
semiconductors?
(i)
positive
(ii)
neutral
(iii)
negative
(iv)
depends on concentration of p impurity
19. To get a n-type
semiconductor from silicon, it should be doped with a
substance
with valence__________.
(i)
2
(ii)
1
(iii)
3
(iv)
5
20. The total number of
tetrahedral voids in the face centred unit cell is __________.
(i)
6
(ii)
8
(iii)
10
(iv)
12
21. Which of the following
point defects are shown by AgBr(s) crystals?
(A)
Schottky defect (B) Frenkel defect
(C)
Metal excess defect (D) Metal deficiency defect
(i)
(A) and (B)
(ii)
(C) and (D)
(iii)
(A) and (C)
(iv)
(B) and (D)
22. In which pair most
efficient packing is present?
(i)
hcp and bcc
(ii)
hcp and ccp
(iii)
bcc and ccp
(iv)
bcc and simple cubic cell
23. Which of the following
statement is not true about the hexagonal close
packing?
(i)
The coordination number is 12.
(ii)
It has 74% packing efficiency.
(iii)
Tetrahedral voids of the second layer are covered by the spheres of the
third
layer.
(iv)
In this arrangement spheres of the fourth layer are exactly aligned with
those
of the first layer.
24. In which of the
following structures coordination number for cations and
anions
in the packed structure will be same?
(i)
Cl– ion form fcc lattice and Na+ ions occupy all octahedral voids of the
unit
cell.
(ii)
Ca2+ ions form fcc lattice and F – ions occupy all the eight tetrahedral
voids
of the unit cell.
(iii)
O2– ions form fcc lattice and Na+ ions occupy all the eight tetrahedral
voids
of the unit cell.
(iv)
S2– ions form fcc lattice and Zn2+ ions go into alternate tetrahedral
voids
of
the unit cell.
25. What is the coordination
number in a square close packed structure in two
dimensions?
(i)
2
(ii)
3
(iii)
4
(iv)
6
26. Which kind of defects
are introduced by doping?
(i)
Dislocation defect
(ii)
Schottky defect
(iii)
Frenkel defects
(iv)
Electronic defects
27. Silicon doped with
electron-rich impurity forms ________.
(i)
p-type semiconductor
(ii)
n-type semiconductor
(iii)
intrinsic semiconductor
(iv)
insulator
28. Which of the following
statements is not true?
(i)
Paramagnetic substances are weakly attracted by magnetic field.
(ii)
Ferromagnetic substances cannot be magnetised permanently.
(iii)
The domains in antiferromagnetic substances are oppositely oriented
with
respect to each other.
(iv)
Pairing of electrons cancels their magnetic moment in the diamagnetic
substances.
29. Which of the following
is not true about the ionic solids?
(i)
Bigger ions form the close packed structure.
(ii)
Smaller ions occupy either the tetrahedral or the octahedral voids
depending
upon their size.
(iii)
Occupation of all the voids is not necessary.
(iv)
The fraction of octahedral or tetrahedral voids occupied depends upon
the
radii of the ions occupying the voids.
30. A ferromagnetic
substance becomes a permanent magnet when it is placed in
a
magnetic field becuase ________.
(i)
all the domains get oriented in the direction of magnetic field.
(ii)
all the domains get oriented in the direction opposite to the direction of
magnetic
field.
(iii)
domains get oriented randomly.
(iv)
domains are not affected by magnetic field.
31. The correct order of the
packing efficiency in different types of unit cells is ________.
(i)
fcc < bcc < simple cubic
(ii)
fcc > bcc > simple cubic
(iii)
fcc < bcc > simple cubic
(iv)
bcc < fcc > simple cubic
32. Which of the following
defects is also known as dislocation defect?
(i)
Frenkel defect
(ii)
Schottky defect
(iii)
Non-stoichiometric defect
(iv)
Simple interstitial defect
33. In the cubic close
packing, the unit cell has ________.
(i)
4 tetrahedral voids each of which is shared by four adjacent unit cells.
(ii)
4 tetrahedral voids within the unit cell.
(iii)
8 tetrahedral voids each of the which is shared by four adjacent unit
cells.
(iv) 8 tetrahedral voids
within the unit cells.
