Solid State Test

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Solid State Test - 6

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Weekly Quiz Competition

Question 1
1 / -0.25

Substances that are strongly attracted by applied magnetic field and can be permanently magnetized are

A
Ferromagnetic

B
Ferrimagnetic

C
Diamagnetic

D
Paramagnetic

Solution

Ferromagnetic substance get permanently magnetised in applied Magnetic Field.
Question 2
1 / -0.25

Which type of solid conduct electricity in molten state but not in solid state?

A
Metallic

B
Covalent

C
Ionic

D
Network

Solution

In molten state ions can exist so they can conduct electricity
Question 3
1 / -0.25

Yellow colour of NaCl crystals in sodium vapour is due to

A
excess of chlorine

B
F center

C
less of chlorine

D
less of sodium
Solution
This yellow colour is due to metal excess defect of anionic valency.
Na+ion deposited on the surface of crystal of NaCl . The Cl-ion diffused to form NaCl. This happens by loss of electron from Na to Na+.
The released electro diffused into the crystal and occupy anionic site called F center which imparts yellow colour to NaCl.
Question 4
1 / -0.25

Dislocation defect is also known as

A
interstitial defects

B
frenkel defects

C
metal excess defect

D
schottky defect

Solution

In frenkel defect cation gets dislocated from its position.
Question 5
1 / -0.25

Defects in solids can be studied using

A
X –ray diffraction

B
Scanning electron microscopy

C
Optical microscopy

D
All of these

Solution

All of the above mentioned methods are used to detect the basic structure of the sample, hence can easily detect the defects present in a sample.
Question 6
1 / -0.25

Point defect is also known as

A
Zero dimensional defect

B
Single dimensional defect

C
Two dimensional defect

D
none of these

Solution

Point defects are zero dimensional defects as they cannot extend in any direction in space. Point defects occur where an atom is missing or misplaced in a crystal lattice. The limit of the size of point defect is not defined.
Question 7
1 / -0.25

Solid X is a very hard electrical insulator in solid as well as in molten state. It melts at extremely high temperature. Solid X is a

A
ionic solid

B
metallic solid

C
covalent solid

D
molecular solid

Solution

Covalent solid doesnot conduct electricity in molten and solid state.
Question 8
1 / -0.25

Nature of binding forces present in carbondioxide molecules in solid state are?

A
Electrostatic forces

B
London forces

C
Hydrogen bonding

D
Metallic forces

Solution

O=C=O <−>−O −C+=O
Question 9
1 / -0.25

What type of interaction hold the molecules together in a polar molecular solid?

A
Hydrogen bonding

B
London forces

C
Metallic bonding

D
Dipole –dipole interaction

Solution

Polar molecule will act as a dipole.
Question 10
1 / -0.25

An atom located at the body center of a cubic unit cell is shared by

A
8 adjacent unit cells

B
2 adjacent unit cells

C
4 adjacent unit cells

D
no other unit cells

Solution

In body centred cubic cell, an atom at the body-centre is shared by 1 unit cell. Thus, this atom contributes one atom to the unit cell.

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Solid State Test - 6

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Solid State Test - 6

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Question 1

Ferromagnetic

Ferrimagnetic

Diamagnetic

Paramagnetic

Solution

Question 2

Metallic

Covalent

Ionic

Network

Solution

Question 3

excess of chlorine

F center

less of chlorine

less of sodium

Solution

Question 4

interstitial defects

frenkel defects

metal excess defect

schottky defect

Solution

Question 5

X –ray diffraction

Scanning electron microscopy

Optical microscopy

All of these

Solution

Question 6

Zero dimensional defect

Single dimensional defect

Two dimensional defect

none of these

Solution

Question 7

ionic solid

metallic solid

covalent solid

molecular solid

Solution

Question 8

Electrostatic forces

London forces

Hydrogen bonding

Metallic forces

Solution

Question 9

Hydrogen bonding

London forces

Metallic bonding

Dipole –dipole interaction

Solution

Question 10

8 adjacent unit cells

2 adjacent unit cells

4 adjacent unit cells

no other unit cells

Solution

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