WorksheetsSOLID STATE
Total questions: 54
Worksheet time: 47mins
Butter and glass are examples of amorphous solids.
True
False
Elasticity is the ability of an object to return to its original form when external forces are removed.
True
False
Water is most dense ar 0° C.
True
False
For what substances is the solid state less dense than the liquid state?
no liquids
most liquids other than water
water
all liquids
A) Graphite is a covalent solid.
B) Graphite is a good conductor.
A and B are correct
B is correct
A is correct
Both are wrong
A. Ionic solids are hard and brittle.
B. Covalent solids are good conductors.
A and B are correct.
A is correct
B is correct
Both A and B are wrong
CsBr has b.c.c. structure with edge length 4.3 A. The shortest inter ionic distance in between Cs+ and Br– is:
3.72
1.86
7.44
4.3
In a ccp (close packed structure) of mixed oxides, it is found that lattice has O2– (oxide ions), and one-half of octahedral voids are occupied by trivalent cations (A3+) and one-eighth of tetrahedral voids are occupied by divalent cations (B2+). Derive formula of the mixed oxide.
ABO3
A2BO4
A3BO4
AB2O4
The addition of CaCl2 crystal to a KCl crystal
Lower the density of the KCl crystal
Raises the density of the KCl crystal
Does not affect the density of the KCl crystal
Increases the Frenkel defects of KCl crystal
If NaCl is doped with 10–4 mol % of SrCl2,the concentration of cation vacancies will be
6.02X 1014 mol-1
6.02X 1015 mol-1
6.02X 1016 mol-1
6.02X 1017 mol-1
Analysis shows that a metal oxide has a empirical formula M0.98O. The percentage M3+ ions in this crystal would be
5.08%
7.01%
4.08%
6.05%
Which of the following compound is metallic and ferromagnetic?
MnO2
VO2
TiO2
CrO2
Percentage of free space in a body centered cubic unit cell is
32%
34%
28%
20%
An ionic compound has a unit cell consisting of A ions at the corners of a cube and B ions on the centres of faces of the cube. The empirical formula of the compound would be
AB
A2B
A3B
AB3
A solid compound contains X, Y and Z atoms in a cubic lattice with X atoms occupying the corners, Y atoms in the body centred position and Z atoms at the centres of faces of the unit cell. What is the empirical formula of the compound?
XY2Z3
XYZ
XYZ3
X2YZ3
In both HCP and CCP the coordination number is
12
6
4
10
Radius ratio of the octahedral void
1.000
0.732
0.224
0.414
Shottkey defect is exhibited by compounds with
low coordination number , small size of cations
low coordination number , same size of ions
high coordination number, same size of ions
high coordination number, small size of cations
Li vapors heated in LICl gives
purple
pink
yellow
None of the above
P can enter the crystal structure of group 14 element forms
P type semi conductor
N- type semi conductor
In Metal the difference of energy between valence band and conduction band
is negligible
is small
is large
None of the above
------------------are attracted by a magnetic field but lose their magnetism in the absence of the magnetic field.
diamagnetic
ferromagnetic
paramagnetic
ferrimagnetic
----------------show permanent magnetism even when the magnetic field is removed
paramagnetic
antiferro magnetic
ferri magnetic
ferro magnetic
Diamond crystalises in
bcc
fcc
simple cube
None of the above
The coordination number of C in graphite is
3
4
6
8
The lattice parameters of a given crystal are a = 5.62 Å, b = 7.41 Å and c = 9.48 Å. The three coordinate axes are mutually perpendicular to each other. The crystal is :
tetragonal
orthorhombic
monoclinic
trigonal
In a face centered cubic arrangement of A and B atoms whose A atoms are at the corner of the unit cell and B atoms at the face centres. One of the A atom Is missing from one corner in unit cell. The simplest formula of the compound is
A7B3
AB3
A7B24
A2B3
A metal crystallizes in two cubic phases i.e., FCC and BCC whose unit cell lengths are 3.5Å and 3.0Å respectively. The ratio of their densities is :
3.12
2.04
1.26
0.72
The numbers of tetrahedral and octahedral holes in a ccp array of 100 atoms are respectively
200 and 100
100 and 200
200 and 200
100 and 100
A metal crystallises in a face centred cubic structure. If the edge length of its unit cell is ‘a’, the closest approach between two atoms in metallic crystal will be:
2√2 a
√2 a
a/√2
2a
A crystalline solid of a pure substance has a face-centred cubic structure with a cell edge of 400 pm. If the density of the substance in the crystal is 8 g cm-3, then the number of atoms present in 256 g of the crystal is N × 1024. The value of N is
1
2
3
4
Sodium metal crystallizes in a body centred cubic lattice with a unit cell edge of 4.29 Å. The radius of sodium atom is approximately
1.85 Å
3.22 Å
5.72 Å
0.93 Å
If the unit cell of a mineral has cubic close packed (ccp) array of oxygen atoms with m fraction of octahedral holes occupied by aluminium ions and n fraction of tetrahedral holes occupied by magnesium ions, m and n, respectively, are
1/2,1/8
1,1/4
1/2,1/2
1/4,1/8
A compound MpXq has cubic close packing (ccp) arrangement of X. Its unit cell structure is show below
MX4
M2X
M2X3
MX2
Analysis shows that a metal oxide has a empirical formula M0.96O. Calculate the percentage of M2+ and M3+ ions in this crystal.
[M2+ = 93.7%, M3+ = 6.3%]
[M2+ = 95.7%, M3+ = 4.3%]
[M2+ = 91.7%, M3+ = 8.3%]
[M2+ = 97.7%, M3+ = 2.3%]
The concentration of cation vacancies in AgCl crystal doped with CdCl2 is found to be 6.02 x 1016 mol–1. What is the concentration of CdCl2 added to it?
10–5 mol% CdCl2
10–4 mol% CdCl2
10–7 mol% CdCl2
10–6mol% CdCl2
An alloy of copper,silver and gold is found to have copper constituting the ccp lattice.If silver atoms occupy the edge centres and gold present at body centre,the alloy has formula
Cu4Ag2Au
Cu4Ag4Au
Cu4Ag3Au
CuAgAu
The appearance of colour in solid alkali metal halides is generally due to
Schottky defect
Frenkel defect
Interstitial position
F-centres
How many unit cells are present in a cube-shaped ideal crystal of NaCl of mass 1.0 g?
5.14 × 1021 unit cells
1.28 × 1021 unit cells
1.71 × 1021 unit cells
2.57 × 1021 unit cell
Which of the following is an amorphous solid?
Graphite (C)
Quartz glass (SiO2)
Chrome alum
Silicon carbide (SiC)
Which of the following arrangements shows schematic alignment of magnetic moments of antiferromagnetic substances?
Which of the following is a network solid?
SO2(Solid)
I2(Solid)
Diamond
H2O(Ice)
Cations are present in the interstitial sites in __________.
Frenkel defect
Schottky defect
Vacancy defect
Metal deficiency defect
Schottky defect is observed in crystals when __________.
some cations move from their lattice site to interstitial sites.
equal number of cations and anions are missing from the lattice.
some lattice sites are occupied by electrons.
some impurity is present in the lattice.
To get a n-type semiconductor from silicon, it should be doped with a substance with valence__________.
5
2
1
3
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
(A) and (B)
(C) and (D)
(A) and (C)
(B) and (D)
