12th Class Chemistry The Solid State / ठोस प्रावस्था Question Bank

MCQs - The Solid State Total Questions - 60

(i)

(iii)

(ii)

(i) and (ii)

View Solution

2)

Solid X is a very hard solid which is electrical insulator in solid as well as in molten state and has extremely high melting point. What type of solid is it?

A)
Ionic solid

B)
Covalent solid

C)
Metallic solid

D)
Molecular solid
View Solution
3)

A compound is formed by two elements Y and Z. The element Z forms ccp and atoms Y occupy 1/3rd of tetrahedral voids. The formula of the compound is

A)
\[{{Y}_{2}}{{Z}_{3}}\]

B)
YZ

C)
\[Y{{Z}_{3}}\]

D)
\[{{Y}_{2}}Z\]
View Solution
4)

Ionic solids conduct electricity in molten state but not in solid state because

A)
in molten state free ions are furnished which are not free to move in solid state

B)
in solid state ionic solids are hard and brittle and become soft in molten state

C)
all solids conduct electricity in molten state

D)
in solid state ions are converted to atoms which are insulators.
View Solution
5)

Monoclinic sulphur is an example of monoclinic crystal system. What are the characteristics of the crystal system?

A)
\[a\ne b\ne c,\,\,\alpha =\beta =\gamma =90{}^\circ \]

B)
\[a\ne b\ne c,\,\,\alpha \ne \beta \ne \gamma \ne 90{}^\circ \]

C)
\[a=b\ne c,\,\,\alpha =\beta =\gamma =90{}^\circ \]

D)
\[a\ne b\ne c,\,\,\alpha =\gamma =90{}^\circ ,\,\,\beta \ne 90{}^\circ \]
View Solution

Match the column I with column II and mark the appropriate choice.

	Column - I (Radius ratio)		Column - II (Coordination number)
[A]	0.155 - 0.225	(i)	4
[B]	0.225 - 0.414	(ii)	8
[C]	0.414 - 0.732	(iii)	3
[D]	0.732 - 1.0	(iv)	6

[A]\[\to \] (i), [B]\[\to \] (ii), [C]\[\to \] (iv), [D]\[\to \] (iii)

[A]\[\to \] (ii), [B]\[\to \] (iv), [C]\[\to \] (i), [D]\[\to \] (iii)

[A]\[\to \] (iv), [B]\[\to \] (iii), [C]\[\to \] (i), [D]\[\to \] (ii)

[A]\[\to \] (iii), [B]\[\to \] (i), [C]\[\to \] (iv), [D]\[\to \] (ii)

View Solution

7)

In face centred cubic unit cell, edge length is

A)
\[\frac{4}{\sqrt{3}}r\]

B)
\[\frac{4}{\sqrt{2}}r\]

C)
2r

D)
\[\frac{\sqrt{3}}{2}r\]
View Solution
8)

How many lithium atoms are present in a unit cell with edge length \[3.5\overset{{}^\circ }{\mathop{A}}\,\] and density \[0.53\text{ }g\text{ }c{{m}^{-3}}\]? (Atomic mass of Li = 6.94)

A)
2

B)
1

C)
4

D)
6
View Solution
9)

Silver halides generally show

A)
Schottky defect

B)
Frenkel defect

C)
both Frenkel and Schottky defects

D)
cation excess defect.
View Solution
10)

Which of the following statements is not correct regarding covalent crystals diamond and graphite?

A)
In diamond, each carbon atom is covalently bonded to four other carbon atoms.

B)
In graphite, each carbon atom is covalently bonded to three other carbon atoms in the same plane.

C)
The \[C-C\] bond length in graphite is intermediate between single and double bond.

D)
Diamond is a layered structure, the two layers joined by van der Waals' forces.
View Solution
11)

Which of the following structures is not correctly matched?

A)
NaCl type - \[C{{l}^{-}}\] ions in ccp structure. \[N{{a}^{+}}\] ions in half octahedral holes.

B)
ZnS type - \[{{S}^{2-}}\] ions in ccp structure. \[Z{{n}^{2+}}\]ions in alternate tetrahedral voids.

C)
\[Ca{{F}_{2}}\] type - \[C{{a}^{2+}}\] ions in ccp structure. \[{{F}^{-}}\] ions in all tetrahedral voids.

D)
\[N{{a}_{2}}O\] type - \[{{O}^{2-}}\] ions in ccp structure. \[N{{a}^{+}}\] ions in all tetrahedral holes.
View Solution
12)

Which of the following statements is not true about the voids?

A)
Octahedral void is formed at the centre of six spheres which lie at the apices of a regular octahedron.

B)
There is one octahedral site for each sphere.

C)
There are two tetrahedral sites for each sphere.

D)
Octahedral voids are formed when the triangular voids in second layer exactly overlap with similar voids in the first layer.
View Solution
13)

Which among the following will show anisotropy?

A)
Glass

B)
NaBr

C)
Plastic

D)
Rubber
View Solution
14)

In the following figure the blank X in known as __________ and why?

A)
Electron trap, because an electron is present

B)
Metal deficient centre, since negative charge is present here.

C)
F-centre, since it imparts colour to the crystal.

D)
P-centre, since it is responsible for positive charge on the crystal.
View Solution
15)

What type of crystal defect is shown in the figure given below?

A)
Frenkel defect

B)
Schottky defect

C)
Interstitial defect

D)
Cation excess defect
View Solution
16)

Study the figure of a solid given below depicting the arrangement of particles. Which is the most appropriate term used for the figure?

A)
Isotropy

B)
Anisotropy

C)
Irregular shape

D)
Amorphous nature
View Solution
17)

Examples of few solids are given below. Find out the example which is not correctly matched.

A)
Ionic solids - NaCl, ZnS

B)
Covalent solids - \[{{H}_{2}}{{I}_{2}}\]

C)
Molecular solids - \[{{H}_{2}}{{O}_{(s)}}\], Urea

D)
Metallic solids - Cu, Sn
View Solution
18)

Complete the following table :

A)

[A] [B] [C] [D]

Impurity defects Stoichio - metric defects Non - stoichio - metric defects Anion excess defects

B)

[A] [B] [C] [D]

Stoichio- metric defects Non - stoichio - metric defects Impurity defects Metal excess defects

C)

[A] [B] [C] [D]

Non - Stoichio - metric Stoichio - metric defects Impurity defects Cation vacancy defects

D)

[A] [B] [C] [D]

Impurity defects Stoichio - metric defects Metal excess defects Non - stoichio - metric defects

View Solution
19)

The unit cell of aluminium is a cube with an edge length of 405 pm. The density of aluminium is \[2.70\text{ }g\text{ }c{{m}^{-\,3}}\]. What is the structure of unit cell of aluminium?

A)
Body-centred cubic cell

B)
Face-centred cubic cell

C)
End-centred cubic cell

D)
Simple cubic cell
View Solution
20)

If three elements X, Y and Z crystallise in a ccp lattice with X atoms at the corners, Y atoms at the cube centre and Z atoms at the edges, the formula of the compound will be

A)
XYZ

B)
\[XY{{Z}_{2}}\]

C)
\[XY{{Z}_{3}}\]

D)
\[{{X}_{2}}{{Y}_{2}}Z\]
View Solution
21)

NaCl type crystal (with coordination no. 6 : 6) can be converted into CsCl type crystal (with coordination no. 8 : 8) by applying

A)
high temperature

B)
high pressure

C)
high temperature and high pressure

D)
low temperature and low pressure.
View Solution
22)

The density of a metal which crystallises in bcc lattice with unit cell edge length 300 pm and molar mass \[50\text{ }g\text{ }mo{{l}^{-1}}\]will be

A)
\[10\text{ }g\text{ }c{{m}^{-\,3}}\]

B)
\[14.2\text{ }g\text{ }c{{m}^{-\,3}}\]

C)
\[6.15\text{ }g\text{ }c{{m}^{-\,3}}\]

D)
\[9.32\text{ }g\text{ }c{{m}^{-\,3}}\]
View Solution
23)

In the given crystal structure what should be the cation X which replaces \[N{{a}^{+}}\]to create to cation vacancy?

A)
\[S{{r}^{2+}}\]

B)
\[{{K}^{+}}\]

C)
\[L{{i}^{+}}\]

D)
\[B{{r}^{-}}\]
View Solution
24)

A crystalline structure has radius ratio\[\left( {{r}_{{{c}^{+}}}}/{{r}_{{{a}^{-}}}} \right)\] in the range of 0.225 - 0.414, The coordination number and arrangement of anions around the cations is

A)
3, plane triangular

B)
6, octahedral

C)
4, tetrahedral

D)
8, cubic.
View Solution
25)

Which of the following primitive cells show the given parameters? \[a\ne b\ne c,\alpha =\beta =\gamma =90{}^\circ \]

A)
Cubic

B)
Tetragonal

C)
Orthorhombic

D)
Hexagonal
View Solution
26)

If the distance between \[N{{a}^{+}}\] and \[C{{l}^{-}}\]in NaCl crystal is 265 pm, the edge length of the unit cell will be

A)
265 pm

B)
795 pm

C)
132.5 pm

D)
530 pm
View Solution
27)

Fill in the blanks by choosing the correct option. Metals often occur in x condition. Individual crystals are randomly oriented so a metallic sample may appear to be y even though a single crystal is z.

A)

x y z

crystalline isotropic anisotropic

B)

x y z

Polycrystalline isotropic anisotropic

C)

x y z

anisotropic isotropic crystalline

D)

x y z

crystalline anisotropic isotropic

View Solution
28)

In \[Ca{{F}_{2}}\] type (fluorite structure) \[C{{a}^{2+}}\]ions form [A] structure and \[{{F}^{-}}\]ions are present in all [B] voids. The coordination number of \[C{{a}^{2+}}\] is [C] and \[{{F}^{-}}\] is [D] [A], [B], [C] and [D] respectively are

A)

[A] [B] [C] [D]

ccp octahedral 8 4

B)

[A] [B] [C] [D]

bcc tetrahedral 4 8

C)

[A] [B] [C] [D]

ccp tetrahedral 8 4

D)

[A] [B] [C] [D]

ccp octahedral 4 8

View Solution
29)

Which is the defect represented by the given figure?

A)
Schottky defect

B)
Frenkel defect

C)
Vacancy defect

D)
Interstitial defect
View Solution
30)

Coordination numbers of \[C{{s}^{+}}\]and \[C{{l}^{-}}\] in CsCl crystal are

A)
8, 8

B)
4, 4

C)
6, 6

D)
8, 4
View Solution

31)

Match the column I with column II and mark the appropriate choice.

	Column I (Structure)		Column II (Packing efficiency)
[A]	Simple cubic structure	(i)	68%
[B]	Face centred cubic structure	(ii)	74%
[C]	Body centred cubic structure	(iii)	52%

[A] \[\to \] (iii), [B] \[\to \] (ii), [C] \[\to \] (i)

[A] \[\to \] (i), [B] \[\to \] (ii), [C] \[\to \] (iii)

[A] \[\to \] (ii), [B] \[\to \] (i), [C] \[\to \] (iii)

[A] \[\to \] (iii), [B] \[\to \] (i), [C] \[\to \] (ii)

View Solution

32)

Which of the following statements is not true?

A)
Silicon carbide is a covalent crystal.

B)
Molecular crystals are soft in nature.

C)
In calcium fluoride structure, coordination number of \[C{{a}^{2+}}\] is 4.

D)
Increase in radius ratio results in increase in coordination number.
View Solution

33)

Match the column I having type of lattice point and its contribution to one unit cell in column II and mark the appropriate choice.

	Column - I (Lattice point)		Column - II (Contribution to one unit cell)
[A]	Corner	(i)	1
[B]	Edge	(ii)	1/8
[C]	Face centre	(iii)	1/4
[D]	Body centre	(iv)	1/2

[A]\[\to \] (ii), [B]\[\to \] (i), [C]\[\to \] (iii), [D]\[\to \] (iv)

[A]\[\to \] (ii), [B]\[\to \] (iii), [C]\[\to \] (iv), [D]\[\to \] (i)

[A]\[\to \] (i), [B]\[\to \] (ii), [C]\[\to \] (iv), [D]\[\to \] (iii)

[A]\[\to \] (iii), [B]\[\to \] (iv), [C]\[\to \] (i), [D]\[\to \] (ii)

View Solution

34)

In the table given below, dimensions and angles of various crystals are given. Complete the table by filling the blanks.

	Type of crystal	Dimensions	Angles
1.	Cubic	A=b=c	\[\alpha =\beta =\gamma \,\,=\,\,\underline{p}\]
2.	Tetragonal	q	\[\alpha =\beta =\gamma =90{}^\circ \]
3.	Orthorhombic	\[a\ne b\ne c\]	r
4.	Hexagonal	s	\[\alpha =\beta ={{90}^{{}^\circ }},\gamma =\underset{\scriptscriptstyle-}{t}\]

p	q	r	s	t
\[90{}^\circ \]	\[a=b\ne c\]	\[\alpha =\beta =\gamma =90{}^\circ \]	\[a=b\ne c\]	\[120{}^\circ \]

p	q	r	s	t
\[120{}^\circ \]	\[a=b=c\]	\[\alpha =90,\beta =\gamma ={{120}^{{}^\circ }}\]	\[a\ne b\ne c\]	\[90{}^\circ \]

p	q	r	s	t
\[90{}^\circ \]	\[a\ne b=c\]	\[\alpha =\beta =\gamma =120{}^\circ \]	\[a\ne b\ne c\]	\[90{}^\circ \]

p	q	r	s	t
\[120{}^\circ \]	\[a\ne b\ne c\]	\[\alpha \ne \beta \ne \gamma \ne 120{}^\circ \]	\[a\ne b=c\]	\[120{}^\circ \]

View Solution

35)

In Zinc blende structure,

A)
zinc ions occupy half of the tetrahedral sites.

B)
each \[Z{{n}^{2+}}\] ion is surrounded by six sulphide ions

C)
each \[{{S}^{2-}}\] ion is surrounded by six \[Z{{n}^{2+}}\] ions

D)
all of these.
View Solution
36)

Match the column A with column B and select the correct option.

Column A Column B

A. Ionic solid I. NaCl

B. Metallic solid II. Fe

C. Covalent solid III. C(graphite)

D. Molecular solid IV. Dry ice

A)
A-II, B-I, C-IV, D-III

B)
A-I, B-II, C-III, D-IV

C)
A-III, B-II, C-I, D-IV

D)
A-II, B-IV, C-I, D-III
View Solution
37)

Which of the following statements is not correct about molecular crystals?

A)
They are generally soft and easily compressible.

B)
They are good conductors of electricity as the electrons are delocalised in bonds.

C)
They have low melting and boiling points.

D)
They consist of polar or non-polar molecules.
View Solution
38)

Which of the following defects is represented in the given figure?

A)
Impurity defect

B)
Frenkel defect

C)
Schottky defect

D)
Metal excess defect
View Solution
39)

A metal crystallises into a lattice containing a sequence of layers as ABABAB .............What percentage of voids are left in the lattice?

A)
72%

B)
48%

C)
26%

D)
32%
View Solution
40)

If the radius of an octahedral void is r and radius of atoms in close packing is R, the relation between r and R is

A)
r = 0.414K

B)
R = 0.414r

C)
r = 2R

D)
\[r=\sqrt{2}R\]
View Solution
41)

A cubic solid is made up of two elements P and Q. Atoms of P are present at the corners of the cube and atoms of Q are present at body centre. What is the formula of the compound and what are coordination numbers of P and Q?

A)
\[P{{Q}_{2}}\,,\,\,6\,\,:\,\,6\]

B)
PQ, 6 : 6

C)
\[{{P}_{2}}Q,\,\,6\,\,:\,\,8~\]

D)
PQ, 8 : 8
View Solution
42)

Total volume of atoms present in a fcc unit cell of a metal with radius r is

A)
\[\frac{12}{3}\pi {{r}^{3}}\]

B)
\[\frac{16}{3}\pi {{r}^{3}}\]

C)
\[\frac{20}{3}\pi {{r}^{3}}\]

D)
\[\frac{24}{3}\pi {{r}^{3}}\]
View Solution
43)

Copper crystallises in fcc with a unit cell length of 361 pm. What is the radius of copper atom?

A)
157pm

B)
181pm

C)
127pm

D)
108pm
View Solution
44)

The fraction of the total volume occupied by the atoms present in a simple cube is

A)
\[\frac{\pi }{4}\]

B)
\[\frac{\pi }{6}\]

C)
\[\frac{\pi }{3\sqrt{2}}\]

D)
\[\frac{\pi }{4\sqrt{2}}\]
View Solution
45)

Volume occupied by single CsCl ion pair in a crystal is \[7.014\times {{10}^{-23\text{ }}}c{{m}^{3}}\]. The smallest Cs - Cs internuclear distance is equal to length of the side of the cube corresponding to volume of one CsCI ion pair. The smallest Cs to Cs internuclear distance is nearly

A)
\[4.4\overset{{}^\circ }{\mathop{A}}\,\]

B)
\[4.3\overset{{}^\circ }{\mathop{A}}\,\]

C)
\[4\overset{{}^\circ }{\mathop{A}}\,\]

D)
\[4.5\overset{{}^\circ }{\mathop{A}}\,\]
View Solution
46)

What type of stoichiometric defect is shown by ZnS?

A)
Schottky defect

B)
Frenkel defect

C)
Both Frenkel and Schottky defects

D)
Non-stoichiometric defect
View Solution
47)

Formula of nickel oxide with metal deficiency defect in its crystal is \[N{{i}_{0.98}}O\]. The crystal contains \[N{{i}^{2+}}\] and \[N{{i}^{3+}}\] ions. The fraction of nickel existing as \[N{{i}^{2+}}\] ions in the crystal is

A)
0.94

B)
0.04

C)
0.50

D)
0.3
View Solution
48)

The edge length of sodium chloride unit cell is 564 pm. If the size of \[C{{l}^{-}}\] ion is 181 pm. The size of \[N{{a}^{+}}\] ion will be

A)
101 pm

B)
181 pm

C)
410pm

D)
202pm
View Solution
49)

The unit cell shown in the figure belongs to

A)
NaCl type

B)
ZnS type

C)
CsCl type

D)
\[Ca{{F}_{2}}\]type.
View Solution
50)

The edge length of unit cells in terms of radius of spheres for fcc is X , for bcc Y and for sec is Z.

A)
\[X=2\sqrt{2}r,\,Y=\frac{4r}{\sqrt{3}},\,Z=2r\]

B)
\[X=\frac{4r}{\sqrt{3}},\,Y=2\sqrt{2},\,Z=2r\]

C)
\[X=2r,\,Y=2\sqrt{2}r,\,Z=\frac{4r}{\sqrt{3}}\]

D)
\[X=2r,\,Y=\frac{4r}{\sqrt{3}},\,Z=2\sqrt{2}r\]
View Solution
51)

A metal has a /cc lattice. The edge length of the unit cell is 404 pm. The density of the metal is \[2.72\,\,g\,\,c{{m}^{-\,3}}\]. The molar mass of the metal is \[({{N}_{A}}\] Avogadro's constant \[=6.02\times {{10}^{23}}mo{{l}^{-1}})\]

A)
\[27\,\,g\,\,mo{{l}^{-1}}\]

B)
\[20\text{ }g\text{ }mo{{l}^{-1}}\]

C)
\[40\text{ }g\text{ }mo{{l}^{-1}}\]

D)
\[30\text{ }g\text{ }mo{{l}^{-1}}\]
View Solution
52)

Zinc oxide loses oxygen on heating according to the reaction, \[ZnO\xrightarrow{heat}Z{{n}^{2+}}+\frac{1}{2}{{O}_{2}}+2{{e}^{-}}\] It becomes yellow on heating because

A)
\[Z{{n}^{2+}}\] ions and electrons move to interstitial sites and F-centres are created

B)
Oxygen and electrons move out of the crystal and ions become yellow

C)
\[Z{{n}^{2+}}\] again combine with oxygen to give yellow oxide

D)
\[Z{{n}^{2+}}\] are replaced by oxygen.
View Solution
53)

In ccp arrangement the pattern of successive layers can be designated as

A)
AB AB AB

B)
ABC ABC ABC

C)
AB ABC AB

D)
ABA ABA ABA
View Solution
54)

Which type of crystals contain more than one Bravais lattice?

A)
Hexagonal

B)
Triclinic

C)
Rhombohedral

D)
Monoclinic
View Solution
55)

For the given structure the site marked as S is a

A)
tetrahedral void

B)
cubic void

C)
octahedral void

D)
none of these.
View Solution
56)

In a Schottky defect,

A)
an ion moves to interstitial position between the lattice points

B)
electrons are trapped in a lattice site

C)
some lattice sites are vacant

D)
some extra cations are present in interstitial spaces.
View Solution
57)

A compound \[{{M}_{p}}{{X}_{q}}\] has cubic close packing (ccp) arrangement of X. Its unit cell structure shown below. The empirical formula of the compound is

A)
MX

B)
\[M{{X}_{2}}\]

C)
\[{{M}_{2}}X\]

D)
\[{{M}_{5}}{{X}_{14}}\]
View Solution
58)

The anionic sites occupied by unpaired electrons are called F-centres or colour centres. They impart (X) colour to the crystals of NaCl. Excess of lithium makes Lid crystals (Y) and excess of potassium makes KCl crystals (Z). (X), (Y) and (Z) are

A)
yellow, green and pink respectively

B)
pink, yellow and violet (or lilac) respectively

C)
yellow, pink and violet (or lilac) respectively

D)
red, yellow and pink respectively.
View Solution
59)

Which of the following statements in not correct about hexagonal close packing?

A)
In hcp, atoms occupy 74% the available space.

B)
It is AB AB type packing in which third layer is aligned with the first layer.

C)
Be, Cd, Li, Ca, Cr etc. are found to have hcp structure.

D)
The coordination number is 6.
View Solution
60)

How many chloride ions are surrounding sodium ion in sodium chloride crystal?

A)
4

B)
8

C)
6

D)
12
View Solution

Study Package

MCQs - The Solid State

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[A]	[B]	[C]	[D]
Impurity defects	Stoichio - metric defects	Non - stoichio - metric defects	Anion excess defects

[A]	[B]	[C]	[D]
Stoichio- metric defects	Non - stoichio - metric defects	Impurity defects	Metal excess defects

[A]	[B]	[C]	[D]
Non - Stoichio - metric	Stoichio - metric defects	Impurity defects	Cation vacancy defects

	Column A		Column B
A.	Ionic solid	I.	NaCl
B.	Metallic solid	II.	Fe
C.	Covalent solid	III.	C(graphite)
D.	Molecular solid	IV.	Dry ice

x	y	z
crystalline	isotropic	anisotropic

x	y	z
Polycrystalline	isotropic	anisotropic

x	y	z
anisotropic	isotropic	crystalline

x	y	z
crystalline	anisotropic	isotropic

12th Class Chemistry The Solid State / ठोस प्रावस्था Question Bank

done MCQs - The Solid State Total Questions - 60

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MCQs - The Solid State

MCQs - The Solid State Total Questions - 60