Question 1

The electrons in Cooper pairs change partners frequently.

Accepted Answer

A) True 
 B)False  True

Question 2

What are polymer-matrix composites? What are their advantages?

Accepted Answer

Polymer-matrix composites consist of reinforcing fibres embedded in a polymer matrix. They are strong, stiff, lightweight materials that are resistant to chemical degradation. Compared with metals, these materials are 25%-50% lighter and thus reduce operating costs.

Question 3

The electrical conductivity of a metal increases with increasing temperature.

Accepted Answer

A) True 
 B)False  False

Question 4

Which of the following statements is true regarding molecular solids?

Accepted Answer

A)  Molecular solids are good conductors of heat and electricity. 
B)  Molecular solids tend to have low melting points. 
C)  Molecular solids are lustrous. 
D)  Molecular solids usually have high density. 
E)  Molecular solids tend to be Hard. 
A)  Molecular solids are good conductors of heat and electricity. 
B)  Molecular solids tend to have low melting points. 
C)  Molecular solids are lustrous. 
D)  Molecular solids usually have high density. 
E)  Molecular solids tend to be Hard.

Question 5

A process that increases the mechanical strength of a material by introducing multiple defects into a material so that the presence of one defect prevents the motion of another is called _____.

Accepted Answer

A)  sintering 
B)  pinning 
C)  work Hardening 
D)  pyrolysis 
E)  doping 
A)  sintering 
B)  pinning 
C)  work Hardening 
D)  pyrolysis 
E)  doping

Question 6

Intersecting dislocations in a solid increases the mechanical strength of the material.

Accepted Answer

A) True 
 B)False

Question 7

According to the _____ theory, electrons are able to travel through a solid with zero resistance because of attractive interactions involving two electrons that are at some distance from each other.

Accepted Answer

The answer of According to the _____ theory, electrons are...

Question 8

A regular repeating three-dimensional structure formed by the constituents of a solid is called a(n) _____.

Accepted Answer

The answer of A regular repeating three-dimensional structure formed by...

Question 9

A substance that has conductivity between that of metals and insulators is called a(n) _____.

Accepted Answer

The answer of A substance that has conductivity between that...

Question 10

A cubic unit cell with eight component atoms, molecules, or ions located at the corners of a cube plus an identical component in the center of the cube is called a _____.

Accepted Answer

A)  simple cubic 
B)  body-centered cubic 
C)  face-centered cubic 
D)  hexagonal close-packed structure 
E)  cubic close-packed structure 
A)  simple cubic 
B)  body-centered cubic 
C)  face-centered cubic 
D)  hexagonal close-packed structure 
E)  cubic close-packed structure

Question 11

A solid solution of two or more metals whose properties differ from those of the constitutional elements is called a(n) _____.

Accepted Answer

The answer of A solid solution of two or more...

Question 12

Density is the mass of substance per unit volume.

Accepted Answer

A) True 
 B)False

Question 13

A cubic unit cell that consists of only eight component atoms, molecules, or ions located at the corners of the cube is called a _____.

Accepted Answer

A)  hexagonal close-packed structure 
B)  simple cubic 
C)  body-centered cubic 
D)  face-centered cubic 
E)  cubic close-packed structure 
A)  hexagonal close-packed structure 
B)  simple cubic 
C)  body-centered cubic 
D)  face-centered cubic 
E)  cubic close-packed structure

Question 14

A defect in an ionic lattice that occurs when one of the ions is in the wrong position is called a(n) _____.

Accepted Answer

A)  plane defect 
B)  line defect 
C)  Frenkel defect 
D)  Schottky defect 
E)  edge dislocation 
A)  plane defect 
B)  line defect 
C)  Frenkel defect 
D)  Schottky defect 
E)  edge dislocation

Question 15

A process that involves a high-temperature decomposition reaction used to form fibers of synthetic polymers is called _____.

Accepted Answer

A)  sintering 
B)  sol-gel process 
C)  pyrolysis 
D)  polymerization 
E)  quenching 
A)  sintering 
B)  sol-gel process 
C)  pyrolysis 
D)  polymerization 
E)  quenching

Question 16

A defect in a crystal that affects only a single particle in the lattice is called a(n) _____.

Accepted Answer

A)  plane defect 
B)  line defect 
C)  point defect 
D)  edge dislocation 
E)  deformation 
A)  plane defect 
B)  line defect 
C)  point defect 
D)  edge dislocation 
E)  deformation

Question 17

_____ is a technique used to obtain information about the structures of crystalline substances using x-rays.

Accepted Answer

The answer of _____ is a technique used to obtain...

Question 18

Occupation of half the tetrahedral holes by cations in an fcc lattice of anions, results in the sodium chloride structure.

Accepted Answer

A) True 
 B)False

Question 19

The process by which monomers are connected into chains or networks by covalent bonds is known as _____.

Accepted Answer

A)  firing 
B)  polymerization 
C)  pyrolysis 
D)  catalysis 
E)  sintering 
A)  firing 
B)  polymerization 
C)  pyrolysis 
D)  catalysis 
E)  sintering

Question 20

Describe the sol-gel process used in the manufacture of ceramics.

Accepted Answer

The sol-gel process is a process used to

Exam 12: Solids

The electrons in Cooper pairs change partners frequently.

What are polymer-matrix composites? What are their advantages?

The electrical conductivity of a metal increases with increasing temperature.

Which of the following statements is true regarding molecular solids?

A process that increases the mechanical strength of a material by introducing multiple defects into a material so that the presence of one defect prevents the motion of another is called _____.

Intersecting dislocations in a solid increases the mechanical strength of the material.

According to the _____ theory, electrons are able to travel through a solid with zero resistance because of attractive interactions involving two electrons that are at some distance from each other.

A regular repeating three-dimensional structure formed by the constituents of a solid is called a(n) _____.

A substance that has conductivity between that of metals and insulators is called a(n) _____.

A cubic unit cell with eight component atoms, molecules, or ions located at the corners of a cube plus an identical component in the center of the cube is called a _____.

A solid solution of two or more metals whose properties differ from those of the constitutional elements is called a(n) _____.

Density is the mass of substance per unit volume.

A cubic unit cell that consists of only eight component atoms, molecules, or ions located at the corners of the cube is called a _____.

A defect in an ionic lattice that occurs when one of the ions is in the wrong position is called a(n) _____.

A process that involves a high-temperature decomposition reaction used to form fibers of synthetic polymers is called _____.

A defect in a crystal that affects only a single particle in the lattice is called a(n) _____.

_____ is a technique used to obtain information about the structures of crystalline substances using x-rays.

Occupation of half the tetrahedral holes by cations in an fcc lattice of anions, results in the sodium chloride structure.

The process by which monomers are connected into chains or networks by covalent bonds is known as _____.

Describe the sol-gel process used in the manufacture of ceramics.

Introduction to Chemistry

Molecules, Ions, and Chemical Formulas

Chemical Reactions

Reactions in Aqueous Solution

Energy Changes in Chemical Reactions

The Structure of Atoms

The Periodic Table and Periodic Trends

Ionic Versus Covalent Bonding

Molecular Geometry and Covalent Bonding Models

Gases

Liquids

Solutions

Chemical Kinetics

Chemical Equilibrium

Aqueous Acidbase Equilibriums

Solubility and Complexation Equilibriums

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Periodic Trends and the S-Block Elements

The P-Block Elements

The D-Block Elements

Organic Compounds

Filters