Question 1

Which element,or combination of elements,could produce a semiconductor with the following band structure? (CB = conduction band,VB = valence band)

Accepted Answer

A)  Pure Si
B)  Si and C
C)  Si and In
D)  Si and Sb
E)  Si and FF) C) and D)
G) B) and D)

Question 2

Which type of polymerization reaction involves the combining of monomer molecules with two different functional groups resulting in the elimination of a small molecule,usually water?

Accepted Answer

A)  Dehydration polymerization
B)  Radical polymerization
C)  Condensation polymerization
D)  Addition polymerization
E)  Dehydrogenation polymerizationF) None of the above
G) D) and E)

Question 3

The monomer for a polyester has the general formula of RCOOR'.

Accepted Answer

A) True 
 B)False

Question 4

Polyacrylonitrile,characterized by the following repeating unit,is made from which of these monomers? 3CH2CN B) HOCH2CH2CH3 C) CH3CH=CHCN D) CH2=CHCN E) CH2=CNCH3" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  CH3CH2CN
B)  HOCH2CH2CH3
C)  CH3CH=CHCN
D)  CH2=CHCN
E)  CH2=CNCH3F) A) and E)
G) A) and B)

Question 5

One characteristic of the monomers that form condensation polymers that is not common in monomers which form addition polymers is

Accepted Answer

A)  the presence of π bonds.
B)  the presence of two functional groups.
C)  the presence of alkyl side chains.
D)  the ability to form free radicals.
E)  the presence of sulfur atoms.F) A) and C)
G) A) and E)

Question 6

Which of the following polymers is used in plastic food bags and wraps?

Accepted Answer

A)  LDPE
B)  PVC
C)  Polystyrene
D)  HDPE
E)  PolypropyleneF) D) and E)
G) B) and D)

Question 7

Which of the following is a natural polymer?

Accepted Answer

A)  Rubber
B)  Polyester
C)  Silk
D)  Rubber & polyester
E)  Rubber & silkF) A) and B)
G) C) and E)

Question 8

What is meant by HIPS?

Accepted Answer

A)  High polysaccharides
B)  High in polysaccharides
C)  Highly ionic polymer solution
D)  High-impact polystyrene
E)  Highly ionic protein solutionF) B) and C)
G) B) and D)

Question 9

What is the name of the substances that exhibit properties of flow,conform to the shape of the container,and have a regular arrangement of particles in a lattice?

Accepted Answer

A)  Lattice polymers
B)  Polymerization fronts
C)  Biphase polymers
D)  Cophase polymers
E)  Liquid crystalsF) C) and D)
G) B) and C)

Question 10

Magnetic levitation is an example of _____ of superconductors below Tc.

Accepted Answer

A)  the Meissner effect
B)  insulation
C)  Oxidation
D)  reduction
E)  the Kamerlingh-Onnes effectF) B) and C)
G) C) and D)

Question 11

List three materials that can be used to give strength to a composite material.

Accepted Answer

Fiberglass...

Question 12

Materials with no resistance to the flow of electrons are called

Accepted Answer

A)  conductors.
B)  insulators.
C)  superconductors.
D)  semiconductors.
E)  nonconductors.F) A) and B)
G) A) and C)

Question 13

Polymers where the substituents alternate positions along polymer chain are called _______________.

Accepted Answer

The answer of Polymers where the substituents alternate positions along...

Question 14

Most high-temperature superconducting materials are

Accepted Answer

A)  metals.
B)  metal chlorides.
C)  polymers.
D)  fullerenes.
E)  ceramics.F) A) and B)
G) B) and D)

Question 15

Which of the following polymers is used in plastic bottles and plastic containers?

Accepted Answer

A)  LDPE
B)  PVC
C)  Polystyrene
D)  HDPE
E)  PolypropyleneF) B) and E)
G) C) and D)

Question 16

Which polymer is a copolymer of a five-carbon sugar,four different bases (adenine,thymine, guanine,and cytosine) ,and phosphoric acid?

Accepted Answer

A)  ATP
B)  ADP
C)  Kevlar
D)  DNA
E)  RNAF) A) and C)
G) B) and C)

Question 17

Which polymer consists mainly of branched chains and is used in plastic food bags and wraps and comes from the addition polymerization of the monomer H2C=CH2?

Accepted Answer

A)  Low-density polyethylene (LDP
E)  
B)  High-density polyethylene (HDP
E)  
C)  Nylon
D)  Dacron
E)  PolyisopreneF) A) and B)
G) A) and C)

Question 18

The segment -CH2CH2CH2CH2CH2CH2- represents the polymer named

Accepted Answer

A)  polystyrene.
B)  polypropylene.
C)  polybutylene.
D)  polyhexene.
E)  polyethylene.F) C) and D)
G) B) and C)

Question 19

Which of the following polymers is a condensation polymer?

Accepted Answer

A)  Polystyrene
B)  Teflon
C)  Polyvinylchloride
D)  Polypropylene
E)  DacronF) A) and D)
G) A) and C)

Question 20

The monomer used to prepare polyvinyl chloride (PVC) is

Accepted Answer

A)  CH2=CH2.
B)  CH3CH2Cl.
C)  CH2=CCl2.
D)  CH2=CHCl.
E)  CF2=CF2.F) D) and E)
G) B) and D)

Exam 12: Modern Materials

What is meant by HIPS?

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Which of the following polymers is used in plastic food bags and wraps?

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Polyacrylonitrile,characterized by the following repeating unit,is made from which of these monomers?

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Which of the following is a natural polymer?

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Magnetic levitation is an example of _____ of superconductors below Tc.

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What is the name of the substances that exhibit properties of flow,conform to the shape of the container,and have a regular arrangement of particles in a lattice?

Correct AnswerverifiedShow Answer

One characteristic of the monomers that form condensation polymers that is not common in monomers which form addition polymers is

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List three materials that can be used to give strength to a composite material.

Correct AnswerverifiedFiberglass...View AnswerShow Answer

Which polymer is a copolymer of a five-carbon sugar,four different bases (adenine,thymine, guanine,and cytosine) ,and phosphoric acid?

Correct AnswerverifiedShow Answer

Which polymer consists mainly of branched chains and is used in plastic food bags and wraps and comes from the addition polymerization of the monomer H2C=CH2?

Correct AnswerverifiedShow Answer

Which of the following polymers is used in plastic bottles and plastic containers?

Correct AnswerverifiedShow Answer

Which type of polymerization reaction involves the combining of monomer molecules with two different functional groups resulting in the elimination of a small molecule,usually water?

Correct AnswerverifiedShow Answer

The monomer used to prepare polyvinyl chloride (PVC) is

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Which of the following polymers is a condensation polymer?

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Polymers where the substituents alternate positions along polymer chain are called _______________.

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The segment -CH2CH2CH2CH2CH2CH2- represents the polymer named

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Which element,or combination of elements,could produce a semiconductor with the following band structure? (CB = conduction band,VB = valence band)

Correct AnswerverifiedShow Answer

The monomer for a polyester has the general formula of RCOOR'.

Correct AnswerverifiedShow Answer

Most high-temperature superconducting materials are

Correct AnswerverifiedShow Answer

Materials with no resistance to the flow of electrons are called

Correct AnswerverifiedShow Answer

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Magnetic levitation is an example of _____ of superconductors below T_c.

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Fiberglass...
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Which polymer consists mainly of branched chains and is used in plastic food bags and wraps and comes from the addition polymerization of the monomer H₂C=CH₂?

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The segment -CH₂CH₂CH₂CH₂CH₂CH₂- represents the polymer named

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