Question 1

Nylon is formed by the reaction of a with a .

Accepted Answer

diamine, diacid

Question 2

MRI stands for .

Accepted Answer

A)  Magnetic Resonance Imaging 
B)  Meissner Resonance Inductance 
C)  Material Research Instrument 
D)  Material Resistive Impedance 
E)  Me Really Imaginative 
A)  Magnetic Resonance Imaging 
B)  Meissner Resonance Inductance 
C)  Material Research Instrument 
D)  Material Resistive Impedance 
E)  Me Really Imaginative A

Question 3

Polyethylene is formed by a condensation reaction.

Accepted Answer

A) True 
 B)False  False

Question 4

Cholesteric liquid crystals are colored because .

Accepted Answer

A)  of the slight twist between layers 
B)  All of the molecules contain multiple benzene rings. 
C)  of the large spacing between layers 
D)  each molecule is a chromophore 
E)  of the large number of conjugated bonds 
A)  of the slight twist between layers 
B)  All of the molecules contain multiple benzene rings. 
C)  of the large spacing between layers 
D)  each molecule is a chromophore 
E)  of the large number of conjugated bonds

Question 5

For a given substance that exhibits liquid- crystalline properties, the liquid- crystalline state exists
)

Accepted Answer

A)  in a range of temperatures above the melting point of the solid 
B)  in a range of temperatures from below the melting point to above the melting point 
C)  at one particular temperature below the melting point of the solid 
D)  in a range of temperatures below the melting point of the solid 
E)  at one particular temperature above the melting point of the solid 
A)  in a range of temperatures above the melting point of the solid 
B)  in a range of temperatures from below the melting point to above the melting point 
C)  at one particular temperature below the melting point of the solid 
D)  in a range of temperatures below the melting point of the solid 
E)  at one particular temperature above the melting point of the solid

Question 6

A biomaterial intended for use as a long- term replacement of a bone must .

Accepted Answer

A)  have sufficient rigidity 
B)  be chemically inert 
C)  possess all of these qualities 
D)  not degrade over time 
E)  not cause an immune response 
A)  have sufficient rigidity 
B)  be chemically inert 
C)  possess all of these qualities 
D)  not degrade over time 
E)  not cause an immune response

Question 7

For a given substance that exhibits liquid- crystalline properties, the transition from solid to liquid- crystal state occurs .

Accepted Answer

A)  over a range of temperatures between the melting point of the solid and the boiling point of the liquid 
B)  at a well defined temperature above the melting point of the solid 
C)  at a well defined temperature below the melting point of the solid 
D)  at the melting point of the solid 
E)  over a range of temperatures that includes the melting point of the solid 
A)  over a range of temperatures between the melting point of the solid and the boiling point of the liquid 
B)  at a well defined temperature above the melting point of the solid 
C)  at a well defined temperature below the melting point of the solid 
D)  at the melting point of the solid 
E)  over a range of temperatures that includes the melting point of the solid

Question 8

The process of adding controlled amounts of impurity atoms to a material is known as
.

Accepted Answer

The answer of The process of adding controlled amounts of...

Question 9

A plasticizer makes a polymer more pliable by reducing the interactions between polymer chains.

Accepted Answer

A) True 
 B)False

Question 10

In the smectic A liquid- crystalline phase, _ .

Accepted Answer

A)  the molecules are oriented in a totally random fashion 
B)  the molecules are aligned with their long axes tilted with respect to a line perpendicular to the plane in which the molecules are stacked 
C)  disk- shaped molecules are aligned through a stacking of the disks in layers 
D)  the molecules are aligned along their long axes, with no ordering with respect to the ends of the molecules 
E)  the molecules are arranged in sheets, with their long axes parallel and their ends aligned as well 
A)  the molecules are oriented in a totally random fashion 
B)  the molecules are aligned with their long axes tilted with respect to a line perpendicular to the plane in which the molecules are stacked 
C)  disk- shaped molecules are aligned through a stacking of the disks in layers 
D)  the molecules are aligned along their long axes, with no ordering with respect to the ends of the molecules 
E)  the molecules are arranged in sheets, with their long axes parallel and their ends aligned as well

Question 11

In the context of biopolymers, the opposite of the polymerization process is .

Accepted Answer

A)  addition 
B)  condensation 
C)  cross- linking 
D)  hydrolysis 
E)  sublimation 
A)  addition 
B)  condensation 
C)  cross- linking 
D)  hydrolysis 
E)  sublimation

Question 12

The empirical formula of an addition polymer .

Accepted Answer

A)  is the same as that of the monomer from which it is formed except that 2 H and 1 C have been added 
B)  is the same as that of the monomer from which it is formed except that 2 H and 1 O have been subtracted 
C)  is the same as that of the monomer from which it is formed except that 2 H and 1 C have been subtracted 
D)  is the same as that of the monomer from which it is formed 
E)  is the same as that of the monomer from which it is formed except that 2 H and 1 O have been added 
A)  is the same as that of the monomer from which it is formed except that 2 H and 1 C have been added 
B)  is the same as that of the monomer from which it is formed except that 2 H and 1 O have been subtracted 
C)  is the same as that of the monomer from which it is formed except that 2 H and 1 C have been subtracted 
D)  is the same as that of the monomer from which it is formed 
E)  is the same as that of the monomer from which it is formed except that 2 H and 1 O have been added

Question 13

Cholesteric liquid crystals have not been used for monitoring of .

Accepted Answer

A)  skin temperature 
B)  all of the above 
C)  hot spots in microelectronic circuits 
D)  temperature of light 
E)  temperature of cookware 
A)  skin temperature 
B)  all of the above 
C)  hot spots in microelectronic circuits 
D)  temperature of light 
E)  temperature of cookware

Question 14

The formation of a condensation polymer generally involves _ .

Accepted Answer

A)  the addition of a plasticizer 
B)  the formation of significant crosslinking 
C)  the elimination of a small molecule 
D)  the mixing of sulfur with an addition polymer 
E)  the vaporization of a plasticizer 
A)  the addition of a plasticizer 
B)  the formation of significant crosslinking 
C)  the elimination of a small molecule 
D)  the mixing of sulfur with an addition polymer 
E)  the vaporization of a plasticizer

Question 15

Superconductivity means that .

Accepted Answer

A)  electrons move faster 
B)  electrons move through a shorter path 
C)  electrons move without resistance 
D)  super expensive materials were used 
E)  diamagnetic atoms become elongated 
A)  electrons move faster 
B)  electrons move through a shorter path 
C)  electrons move without resistance 
D)  super expensive materials were used 
E)  diamagnetic atoms become elongated

Question 16

There are different amino acids present in most proteins.

Accepted Answer

A)  1 
B)  2 
C)  99 
D)  16 
E)  20 
A)  1 
B)  2 
C)  99 
D)  16 
E)  20

Question 17

Materials that eventually break down in the body .

Accepted Answer

A)  are always toxic 
B)  cannot be used as biomaterials 
C)  can be used to construct "scaffoldings" on which natural cells grow 
D)  can be used to construct bone- replacements 
E)  can be used to construct long- term replacements for heart valves 
A)  are always toxic 
B)  cannot be used as biomaterials 
C)  can be used to construct "scaffoldings" on which natural cells grow 
D)  can be used to construct bone- replacements 
E)  can be used to construct long- term replacements for heart valves

Question 18

Advantages to replacement of metal parts used in high- temperature applications with ceramics include:
1) Ceramics are easily manufactured free of defects.
2) Ceramics are less dense than metals.
3) Ceramics are less brittle than metals.
4) Ceramics are more resistant to corrosion than metals.

Accepted Answer

A)  2, 3, 4 
B)  1, 2, 4 
C)  2, 4 
D)  1, 2, 3, 4 
E)  1, 3, 4 
A)  2, 3, 4 
B)  1, 2, 4 
C)  2, 4 
D)  1, 2, 3, 4 
E)  1, 3, 4

Question 19

A _ _ liquid crystal has the least order and is the most liquid- like.

Accepted Answer

A)  smectic B 
B)  cholesteric 
C)  nematic 
D)  smectic C 
E)  smectic 
A)  smectic B 
B)  cholesteric 
C)  nematic 
D)  smectic C 
E)  smectic

Question 20

A category plastic container will generally be the most easily recycled.

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  22 
A)  1 
B)  2 
C)  3 
D)  4 
E)  22

Exam 12: Modern Materials

Nylon is formed by the reaction of a with a .

MRI stands for .

Polyethylene is formed by a condensation reaction.

Cholesteric liquid crystals are colored because .

For a given substance that exhibits liquid- crystalline properties, the liquid- crystalline state exists )

A biomaterial intended for use as a long- term replacement of a bone must .

For a given substance that exhibits liquid- crystalline properties, the transition from solid to liquid- crystal state occurs .

The process of adding controlled amounts of impurity atoms to a material is known as .

A plasticizer makes a polymer more pliable by reducing the interactions between polymer chains.

In the smectic A liquid- crystalline phase, _ .

In the context of biopolymers, the opposite of the polymerization process is .

The empirical formula of an addition polymer .

Cholesteric liquid crystals have not been used for monitoring of .

The formation of a condensation polymer generally involves _ .

Superconductivity means that .

There are different amino acids present in most proteins.

Materials that eventually break down in the body .

Advantages to replacement of metal parts used in high- temperature applications with ceramics include: 1) Ceramics are easily manufactured free of defects. 2) Ceramics are less dense than metals. 3) Ceramics are less brittle than metals. 4) Ceramics are more resistant to corrosion than metals.

A _ _ liquid crystal has the least order and is the most liquid- like.

A category plastic container will generally be the most easily recycled.

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Gases

Intermolecular Forces, Liquids, and Solids

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Chemistry of Coordination Compounds

The Chemistry of Life: Organic and Biological Chemistry

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