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Solid state

Total questions: 83

Worksheet time: 42mins

Name
Class
Date
1.

The number of nearest particles which is in direct contact with a particle in a closed packed structure

a)

Unit Cell

b)

Void

c)

Packing efficiency

d)

Coordination number

2.

Crystal system characterized by a ≠ b≠ c and α = β = γ = 90o

a)

Hexagonal

b)

Ortho rhombic

c)

Tetragonal

d)

Triclinic

3.

Smallest repeating unit of crystal lattice

a)

Lattice site

b)

Unit cell

c)

Crystal lattice

d)

Lattice point

4.

Number of atoms per unit cell in a Face Centered Cubic lattice

a)

4

b)

1

c)

2

d)

6

5.

Example for crystalline solid

a)

Glass

b)

Quartz

c)

Plastic

d)

Rubber

6.

Crystalline solids are

a)

Isotropic

b)

Allotropic

c)

Anisotropic

d)

Isomorphic

7.

Crystal showing both Schottky & Frenkel defect

a)

AgBr

b)

ZnO

c)

AgI

d)

NaCl

8.

Anionic sites occupied by unpaired electrons are called

a)

F Centres

b)

Interstitial Centres

c)

Cationic Centres

d)

Anionic Centres

9.

Frenkel defect is also known as

a)

Metal Deficiency Defect

b)

Impurity Defect

c)

Metal Excess Defect

d)

Dislocation Defect

10.

p-type semiconductors are formed when Silicon or Germanium is doped with Group

a)

13

b)

14

c)

12

d)

15

11.

An amorphous solid

a)

CaCl2

b)

NaCl

c)

Glass

d)

CsCl

12.

A semiconductor material

a)

Ga

b)

As

c)

Ge

d)

Al

13.

An example for Network solid

a)

Corundum

b)

Diamond

c)

Dry Ice

d)

KCl

14.

AB AB … type close packing pattern represents

a)

HCP

b)

FCC

c)

CCP

d)

BCC

15.

The percentage of empty space in a face centre cubic arrangement is

a)

74

b)

52

c)

68

d)

26

16.

A liquid which is permanently supercooled is frequently called

(a)  

17.

The substance which is not antiferromagnetic is

a)

V2O3

b)

Fe2O3

18.

Copper has the face centered cubic structure. The coordination number of each ion is

a)

4

b)

12

c)

14

d)

8

19.

The number of atoms per unit cell in simple, fcc and bcc unit cells are

a)

1, 4, 2

b)

1, 2, 4

c)

2, 1, 4

d)

2, 4, 1

20.

The packing efficiency in simple, fcc, bcc unit cells will be respectively

a)

74% 52.4% 68%

b)

52.4% 68% 74%

c)

68% 74% 52.4%

d)

52.4% 74% 68%

21.

The relationship between the atomic radius (r) and edge length (a) of a simple, fcc, bcc cubic unit cell will be respectively

a)

a2\frac{a}{2} 2a4\frac{\sqrt{2}a}{4} 3a4\frac{\sqrt{3}a}{4}

b)

a2\frac{a}{2} 3a4\frac{\sqrt{3}a}{4} 2a4\frac{\sqrt{2}a}{4}

c)

2a4\frac{\sqrt{2}a}{4} 3a4\frac{\sqrt{3}a}{4} a2\frac{a}{2}

d)

3a4\frac{\sqrt{3}a}{4} a2\frac{a}{2} 3a4\frac{\sqrt{3}a}{4}

22.

The coordination number in simple, fcc, bcc close packing arrangement will be respectively

a)

1, 4, 2

b)

6, 12, 8

c)

4, 6, 8

d)

none of the above

23.

In METAL EXCESS DEFECTS the sites where an electron gets trapped in the anionic vacancy disturbing the ratio of cation to anion is known as

a)

E- CENTRE

b)

F- CENTRE

c)

G- CENTRE

d)

I- CENTRE

24.

Which of the following is not a characteristic of a crystalline solid?

a)

Definite and characteristic heat of fusion.

b)

Long range order or perfect arrangement of constituent particles

c)

Isotropic in nature

d)

clean cleavage or smooth edges on cutting with a knife

25.

Which of the following is an amorphous solid?

a)

Copper(Cu)

b)

Quartz glass (SiO2)

c)

Silicon carbide (SiC)

d)

Sodium Chloride (NaCl)

26.

The type of crystalline solid which is a good conductor in solid as well as molten state?

a)

Ionic Solid

b)

Metallic Solid

c)

Covalent Solid

d)

Molecular Solid

27.

The total number of tetrahedral voids and octahedral voids per unit cell of face-centred cell (fcc) are

a)

8, 4

b)

4, 8

c)

2, 4

d)

4, 2

28.

A. Ionic solids are hard and brittle.

B. Covalent solids are good conductors.

a)

A and B are correct.

b)

A is correct

c)

B is correct

d)

Both A and B are wrong

29.

Percentage of free space in a body centered cubic unit cell is

a)

32%

b)

34%

c)

28%

d)

20%

30.

In both HCP and CCP the coordination number is

a)

12

b)

6

c)

4

d)

10

31.

Which of the following is a network solid?

a)

SO2(Solid)

b)

I2(Solid)

c)

Diamond

d)

H2O(Ice)

32.

The coordination number of atoms in a body-centred cubic structure is ________.

a)

4

b)

8

c)

6

d)

12

33.

The type defect observed in ionic crystals which large difference in the size of ions is:

a)

Interstitial defect

b)

Frenkel defect

c)

Schottky Defect

d)

Stoichiometric Defect

34.

A mixed oxide has ccp arrangement in which the cations 'X' occupy 1/3rd of octahedral voids and the cations 'Y' occupy 1/3rd of tetrahedral voids.The formula of oxide is:

a)

X 2Y 3O 2

b)

XY 3O

c)

X 2YO 3

d)

XY 2O 3

35.

A solid is made up of 2 elements P and Q. Atoms Q are in ccp arrangement,while P atoms occupy all the tetrahedral sites.The formula of the compound is:

a)

PQ 2

b)

P 6Q 4

c)

P 2Q

d)

PQ

36.

Atoms of element B form hcp lattice and those of the element A occupy 2/3rd of tetrahedral voids. The formula of the compound formed by the elements A and B is:

a)

A 4B 3

b)

A 2B

c)

A 3B 4

d)

AB

37.

Name the defects noticed when a solid is heated.

a)

Frenkel Defect

b)

Interstitial Defect

c)

Schottky Defect

d)

Vacancy Defect

38.

Which of the following is a network solid or covalent crystalline solid?

a)

Diamond (C)

b)

H2O (Ice)

c)

Calcium Fluoride (CaF2)

d)

Iron Metal (Fe)

39.

Percentage of free space in a body centered cubic unit cell is

a)

32%

b)

34%

c)

28%

d)

20%

40.

The white ZnO turns yellow on heating because of

a)

Frenkel defect

b)

Metal excess defect

c)

metal deficiency defect

d)

Schottky defect

41.

Three elements A,B and C crystallise into a cubic solid lattice. Atom A occupy the corners,B occupy the cube centres and C occupy the edges. The formula of the compound is

a)

ABC

b)

ABC2

c)

ABC3

d)

ABC4

42.

Crystal system characterized by a ≠ b≠ c and α = β = γ = 90o

a)

Hexagonal

b)

Ortho rhombic

c)

Tetragonal

d)

Triclinic

43.

Crystal system characterized by a ≠ b≠ c and α = β = γ = 90o

a)

Hexagonal

b)

Ortho rhombic

c)

Tetragonal

d)

Triclinic

44.

Smallest repeating unit of crystal lattice

a)

Lattice site

b)

Unit cell

c)

Crystal lattice

d)

Lattice point

45.

Anionic sites occupied by unpaired electrons are called

a)

F Centres

b)

Interstitial Centres

c)

Cationic Centres

d)

Anionic Centres

46.

The packing efficiency in simple, fcc, bcc unit cells will be respectively

a)

74% 52.4% 68%

b)

52.4% 68% 74%

c)

68% 74% 52.4%

d)

52.4% 74% 68%

47.

The total number of tetrahedral voids and octahedral voids in a given cubic unit cell with N number of atoms will be respectively

a)

2N and N

b)

N and 2N

c)

4N and N

d)

N and 4N

48.

Analysis shows that FeO has a non-stoichiometric composition with formula Fe0·95O. Give reason.

a)

Schottky defect

b)

Frenkel defect

c)

Metal excess defect

d)

Metal deficiency defect

49.

Iron oxide crystallises in a hexagonal close-packed array of oxide ions with two out of every three octahedral holes occupied by iron ions. What is the formula of the iron oxide?

a)

FeO

b)

Fe2O3

c)

Fe3O4

d)

None of these

50.

Schottky defect is observed when

a)

unequal number of cations and anions is missing from the crystal lattice.

b)

equal number of cations and anions is missing from the crystal lattice.

c)

an ion leaves its normal site and occupy interstitial site.

d)

density of the crystal increases.

51.

Which of the following is not a characteristic of a crystalline solid?

a)

Definite and characteristic heat of fusion.

b)

Long range order or perfect arrangement of constituent particles

c)

Isotropic in nature

d)

clean cleavage or smooth edges on cutting with a knife

52.

The ability of crystalline solids to change values of physical properties when measured in different directions is called _______.

a)

polymorphism

b)

isomorphism

c)

anisotropy

d)

isotropy

53.

The interparticle forces in solid hydrogen are _______.

a)

hydrogen bonds

b)

covalent bonds

c)

coordinate bonds

d)

van der Waal’s forces

54.

If the coordination number of Ca2+ in CaF2 is 8, then the coordination number of F ion would be _______.

a)

3

b)

4

c)

6

d)

8

55.

A metallic element crystallizes in simple cubic lattice. Each edge length of the unit cell is 3 Å. The density of the element is 8 g / cc. Number of unit cells in 108 g of the metal is _______. (Molar mass of the metal = 108 g/mol.)

a)

1.33 × 1020

b)

2.7 × 1022

c)

5 × 1023

d)

2 × 1024

56.

An alloy of Cu, Ag and Au is found to have copper constituting the ccp lattice. If silver atoms occupy the edge centre and gold is present at body centre, the alloy has a formula _______.

a)

Cu4Ag2Au

b)

Cu4Ag4Au

c)

Cu4Ag3Au

d)

CuAgAu

57.

In Corundum, oxide ions are arranged in hcp arrangement and aluminium ions occupy two third of the octahedral holes. Its formula is

a)

Al2O3

b)

Al2O4

c)

Al2O2

d)

AlO2

58.

Frenkel defect is caused due to _______.

a)

an ion missing from the normal lattice site creating a vacancy

b)

an extra positive ion occupying an interstitial position in the lattice

c)

an extra negative ion occupying an interstitial position in the lattice

d)

the shift of a positive ion from its normal lattice site to an interstitial site

59.

NaCl shows Schottky defects and AgCl Frenkel defects. Their electrical conductivity is due to _______.

a)

motion of ions and not the motion of electrons

b)

motion of electrons and not the motion of ions

c)

lower coordination number of NaCl

d)

higher coordination number of AgCl

60.

Band theory of metals is based on _______.

a)

valence bond theory

b)

molecular orbital theory

c)

crystal field theoryy

d)

ligand field theory

61.

The number of unit cells in 58.5 g of NaCl is nearly _______.

a)

(A) 6 X1020

b)

(B) 3 X1022

c)

(C) 1.5 X 1023

d)

(D) 0.5X 1024

62.

................. are orderly collection of positive ions surrounded by and held together by a sea of free electrons

a)

Metals

b)

Non metals

c)

metalloids

63.

A space lattice is also called ...........

a)

crystal lattice

b)

motif

c)

unit cell

64.

A unit cell is characterized by how many parameters?

a)

4

b)

5

c)

6

d)

7

65.

The number of atoms present in fcc = ..............

a)

1

b)

2

c)

3

d)

4

66.

In monoclinic crystal system, which among the following variations are possible?

a)

Primitive, End-centred

b)

Body-centred, Face-centred

c)

Primitive, Body-centred, Face-centred, End-centred

d)

Primitive, Body-centred, Face-centred

67.

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.

a)

5x1024

b)

5x1025

c)

6x1023

d)

2x1025

68.

Percentages of free space in cubic close packed structure and in body centred packed

structure are respectively.

a)

48% and 36 %

b)

32% and 48 %

c)

30% and 26 %

d)

26% and 32 %

69.

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

atom?

a)

108 pm

b)

127 pm

c)

157 pm

d)

181 pm

70.

Schottky defect in crystals is observed

a)

when unequal number of cations and anions are missing from the lattice.

b)

when equal number of cations and anions are missing from the lattice.

c)

when an ion leaves its normal site and occupies an interstitial site.

d)

when the density of the crystal is increased.

71.

The colours of some otherwise colourless compounds are due to.

a)

Metal deficiency defect

b)

Schottky defect

c)

Frenkel defect

d)

Metal excess defect (F-Centres)

72.

Which among the following is not an example of amorphous solids?

a)

Quartz

b)

Glass

c)

Coke

d)

Plastic

73.

Amorphous solids are also known as.

a)

True solids

b)

Pseudo solids

c)

Poly crystalline solids

d)

None of these

74.

a)

A

b)

B

c)

C

d)

D

75.

What is simplest formula of a compound formed between A and B, if A makes Primitive cubic unit cell and atoms of B occupy body centre.

a)

A2B

b)

AB2

c)

AB

d)

A2B3

76.

What is coordination number of a tetrahedral void

a)

3

b)

4

c)

6

d)

12

77.

What is coordination number of an octahedral void

a)

3

b)

4

c)

6

d)

12

78.

If x atoms undergo CCP, what is the number of octahedral voids

a)

X

b)

2x

c)

3x

d)

4x

79.

Which of the following is an amorphous solid?

a)

Copper(Cu)

b)

Quartz glass (SiO2)

c)

Silicon carbide (SiC)

d)

Sodium Chloride (NaCl)

80.

Which of the following is a network solid or covalent crystalline solid?

a)

Diamond (C)

b)

H2O (Ice)

c)

Calcium Fluoride (CaF2)

d)

Iron Metal (Fe)

81.

Which of the following unit cell has all the angles at 90˚ but the sides are of unequal length?

a)

Orthorhombic unit cell

b)

Monoclinic unit cell

c)

Triclinic unit cell

d)

Hexagonal unit cell

82.

The no. of atoms present per unit cell in simple, face-centred and body centred unit cells are respectively

a)

1, 4, 3

b)

1, 2, 4

c)

2, 4,1

d)

1, 4, 2

83.

If the Radius Ratio (rcation / ranion) is 0.414 then what would be the coordination number and structural arrangement?

a)

3, Triangular

b)

4, Tetrahedral

c)

6, Octahedral

d)

8, Body Centred

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