Question 1

A solid has a very high melting point, great hardness, and poor electrical conduction. This is a(n)__________ solid.

Accepted Answer

A) ionic 
B) molecular 
C) metallic 
D) covalent network 
E) metallic and covalent network 
A) ionic 
B) molecular 
C) metallic 
D) covalent network 
E) metallic and covalent network D

Question 2

Vulcanization involves heating rubber with sulfur dioxide to produce a thermosetting polymer.

Accepted Answer

A) True 
 B)False  False

Question 3

An elastomer will fail to regain its original dimensions following a distortion beyond its __________.

Accepted Answer

A) glass transition 
B) phase boundary 
C) London force 
D) crystallinity 
E) elastic limit 
A) glass transition 
B) phase boundary 
C) London force 
D) crystallinity 
E) elastic limit E

Question 4

12 karat gold contains __________% gold.

Accepted Answer

A) 12 
B) 25 
C) 5.0 x 101 
D) 75 
E) 1.0 x 102 
A) 12 
B) 25 
C) 5.0 x 101 
D) 75 
E) 1.0 x 102

Question 5

When the size of a semiconductor particle or crystal __________, the band gap energy __________.

Accepted Answer

A) decreases, decreases 
B) decreases, remains the same 
C) increases, increases 
D) decreases, increases 
E) decreases, goes to zero 
A) decreases, decreases 
B) decreases, remains the same 
C) increases, increases 
D) decreases, increases 
E) decreases, goes to zero

Question 6

The type of solid that is characterized by low melting point, softness, and low electrical conduction is a covalent-network solid.

Accepted Answer

A) True 
 B)False

Question 7

Polymers formed from two different monomers are called __________.

Accepted Answer

The answer of Polymers formed from two different monomers are...

Question 8

Which of the following is not classified as a nanomaterial?

Accepted Answer

A) isoprene 
B) buckminsterfullerene 
C) carbon nanotubes 
D) graphene 
E) All of the above are classified as nanomaterials 
A) isoprene 
B) buckminsterfullerene 
C) carbon nanotubes 
D) graphene 
E) All of the above are classified as nanomaterials

Question 9

Intermetallic compounds are examples of

Accepted Answer

A) homogeneous alloys. 
B) heterogeneous alloys. 
C) interstitial alloys. 
D) solution alloys. 
E) ionic compounds. 
A) homogeneous alloys. 
B) heterogeneous alloys. 
C) interstitial alloys. 
D) solution alloys. 
E) ionic compounds.

Question 10

6.0 karat gold contains __________% gold.

Accepted Answer

A) 6.0 
B) 25 
C) 5.0 x 101 
D) 75 
E) 1.0 x 102 
A) 6.0 
B) 25 
C) 5.0 x 101 
D) 75 
E) 1.0 x 102

Question 11

Semiconductors are less conductive than metals because of __________ gap.

Accepted Answer

The answer of Semiconductors are less conductive than metals because...

Question 12

Consider the following statements about crystalline solids: (i)Molecules or atoms in molecular solids are held together via
Intermolecular forces.
(ii)Metallic solids have atoms in the points of the crystal lattice.
(iii)Ionic solids have formula units in the point of the crystal lattice.
(iv)Atoms in covalent-network solids are connected via a network
Of covalent bonds.
Which of the statements is false?

Accepted Answer

A) (i) 
B) (ii) 
C) (iii) 
D) (iv) 
E) none 
A) (i) 
B) (ii) 
C) (iii) 
D) (iv) 
E) none

Question 13

__________ are solid-state materials that can be made either semiconducting or metallic without any doping.

Accepted Answer

The answer of __________ are solid-state materials that can be...

Question 14

Of the following, only __________ is not a polymer.

Accepted Answer

A) cellulose 
B) nylon 
C) starch 
D) protein 
E) stainless steel 
A) cellulose 
B) nylon 
C) starch 
D) protein 
E) stainless steel

Question 15

CsCl crystallizes in a unit cell that contains a Cs+ ion at the center of a cube and a Cl- ion at each corner. The unit cell of CsCl is __________.

Accepted Answer

A) close packed 
B) body-centered cubic 
C) face-centered cubic 
D) amorphous 
E) primitive cubic 
A) close packed 
B) body-centered cubic 
C) face-centered cubic 
D) amorphous 
E) primitive cubic

Question 16

The dopant atoms in an n-type semiconductor have __________ electrons than the host material.

Accepted Answer

The answer of The dopant atoms in an n-type semiconductor...

Question 17

Polyethylene is formed by a condensation reaction.

Accepted Answer

A) True 
 B)False

Question 18

Of the following, only __________ is an addition polymer.

Accepted Answer

A) polyethylene terephthalate 
B) polystyrene 
C) polyurethane 
D) polycarbonate 
E) Nylon 6,6 
A) polyethylene terephthalate 
B) polystyrene 
C) polyurethane 
D) polycarbonate 
E) Nylon 6,6

Question 19

CsCl crystallizes in a unit cell that contains the Cs+ ion at the center of a cube that has a Cl- at each corner. Each unit cell contains __________ Cs+ ions and __________ Cl-, ions, respectively.

Accepted Answer

A) 1 and 8 
B) 2 and 1 
C) 1 and 1 
D) 2 and 2 
E) 2 and 4 
A) 1 and 8 
B) 2 and 1 
C) 1 and 1 
D) 2 and 2 
E) 2 and 4

Question 20

What two metals are alloyed to produce sterling silver?

Accepted Answer

The answer of What two metals are alloyed to produce...

Exam 12: Solids and Modern Materials

A solid has a very high melting point, great hardness, and poor electrical conduction. This is a(n)__________ solid.

Vulcanization involves heating rubber with sulfur dioxide to produce a thermosetting polymer.

An elastomer will fail to regain its original dimensions following a distortion beyond its __________.

12 karat gold contains __________% gold.

When the size of a semiconductor particle or crystal __________, the band gap energy __________.

The type of solid that is characterized by low melting point, softness, and low electrical conduction is a covalent-network solid.

Polymers formed from two different monomers are called __________.

Which of the following is not classified as a nanomaterial?

Intermetallic compounds are examples of

6.0 karat gold contains __________% gold.

Semiconductors are less conductive than metals because of __________ gap.

__________ are solid-state materials that can be made either semiconducting or metallic without any doping.

Of the following, only __________ is not a polymer.

CsCl crystallizes in a unit cell that contains a Cs+ ion at the center of a cube and a Cl- ion at each corner. The unit cell of CsCl is __________.

The dopant atoms in an n-type semiconductor have __________ electrons than the host material.

Polyethylene is formed by a condensation reaction.

Of the following, only __________ is an addition polymer.

CsCl crystallizes in a unit cell that contains the Cs+ ion at the center of a cube that has a Cl- at each corner. Each unit cell contains __________ Cs+ ions and __________ Cl-, ions, respectively.

What two metals are alloyed to produce sterling silver?

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

When the size of a semiconductor particle or crystal , the band gap energy .

CsCl crystallizes in a unit cell that contains a Cs⁺ ion at the center of a cube and a Cl^- ion at each corner. The unit cell of CsCl is __________.

CsCl crystallizes in a unit cell that contains the Cs⁺ ion at the center of a cube that has a Cl^- at each corner. Each unit cell contains Cs⁺ ions and Cl^-, ions, respectively.