Question 1

In which type of polymer are the chains packed less tightly together,resulting in lower melting points and a softer texture?

Accepted Answer

A)  Isotactic polymers
B)  Syndiotactic polymers
C)  Atactic polymers
D)  Cross-linked polymersE) All of the above
F) None of the above

Question 2

Which one of the following monomers undergoes cationic polymerization most readily?

Accepted Answer

A)  H2C=CH2
B)  H2C=CHCH3
C)  H2C=C(CH3) 2
D)  H2C=CHCNE) A) and B)
F) B) and C)

Question 3

Which of the following is (are) repeating unit(s) of step-growth polymers?

Accepted Answer

A)  Only I
B)  Only II
C)  Only III
D)  I and IIE) B) and D)
F) C) and D)

Question 4

Which one of the following monomers undergoes anionic polymerization most readily?

Accepted Answer

A)  H2C=CH2
B)  H2C=CHCH3
C)  H2C=C(CH3) 2
D)  H2C=CHCNE) A) and C)
F) B) and C)

Question 5

The repeating unit of poly(methyl methacrylate) is shown below.Which one of the following is the monomer used to make poly(methyl methacrylate) ?

Accepted Answer

A)  A
B)  B
C)  C
D)  DE) A) and B)
F) A) and C)

Question 6

Which of the following is the repeating unit of the polymer formed in the polymerization of p-hydroxybenzoic acid?

Accepted Answer

A)  A
B)  B
C)  C
D)  DE) C) and D)
F) A) and D)

Question 7

What is the classification of the following polymer in which X and Y represent repeating units?

Accepted Answer

A)  Block copolymer
B)  Homopolymer
C)  Alternating copolymer
D)  Random copolymerE) A) and B)
F) A) and C)

Question 8

Identify the monomer(s) needed to make the following polyester.

Accepted Answer

A)  3-Hydroxybutanoic acid
B)  Butanedioic acid
C)  Butanedioic acid and ethylene glycol
D)  Butanedioic acid and ethanolE) None of the above
F) A) and B)

Question 9

Which of the following initiators can be used for anionic chain-growth polymerization?

Accepted Answer

A)  Benzoyl peroxide
B)  CH3CH2CH2CH2Li
C)  BF3
D)  Al(CH2CH3) 3,TiCl4E) A) and B)
F) B) and C)

Question 10

The acid-catalyzed dimerization of isobutylene gives a mixture of two isomeric alkenes,A and B.Hydrogenation of this mixture gives a single C8H18 hydrocarbon.What is the structure of this hydrocarbon? 8H18 hydrocarbon.What is the structure of this hydrocarbon?   A) 2,2,4-Trimethylpentane B) 2,3,4-Trimethylpentane C) 2,4-Dimethylhexane D) 2,5-Dimethyhexane" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  2,2,4-Trimethylpentane
B)  2,3,4-Trimethylpentane
C)  2,4-Dimethylhexane
D)  2,5-DimethyhexaneE) B) and C)
F) A) and C)

Question 11

Which of the following is the repeating unit of the polymer formed in the polymerization reaction shown below?

Accepted Answer

A)  A
B)  B
C)  C
D)  DE) None of the above
F) C) and D) B

Question 12

What is the name given to polymers with single monomers?

Accepted Answer

A)  Homopolymers
B)  Copolymers
C)  Block polymers
D)  Random polymersE) C) and D)
F) A) and C)

Question 13

Which of the following monomers yields the polymer shown below?

Accepted Answer

A)  A
B)  B
C)  C
D)  DE) All of the above
F) None of the above

Question 14

Which of the following is the repeating unit in polyvinyl chloride (PVC) ?

Accepted Answer

A)  A
B)  B
C)  C
D)  DE) A) and C)
F) A) and B) A

Question 15

What modification occurs when a small amount of p-divinylbenzene is added to the polymerization reaction of styrene to form polystyrene? (Recall that the vinyl group is -CH=CH2.)

Accepted Answer

A)  Cross-linking of the polystyrene
B)  Isotactic stereochemistry of the polystyrene
C)  Syndiotactic stereochemistry of the polystyrene
D)  "Softening" of the polystyrene by a plasticizerE) B) and C)
F) B) and D) A

Question 16

What monomer(s) would be used to make the polyester shown below?

Accepted Answer

A)  Butanedioic acid
B)  4-Hydroxybutanal
C)  4-Hydroxybutanoic acid
D)  Butanedioic acid and 1,4-butanediolE) B) and D)
F) A) and C)

Question 17

Which of the following is (are) addition polymer(s) ? I.polypropylene
II) Teflon
III) nylon

Accepted Answer

A)  Only I
B)  Only II
C)  Only III
D)  Both I and IIE) B) and D)
F) A) and B)

Question 18

Rank the following monomers (X,Y and Z) in order of increasing ability to undergo anionic polymerization,starting with the least reactive monomer.

Accepted Answer

A)  Y
B)  Z 
C)  X 
D)  Y < Z < XE) A) and D)
F) A) and B)

Question 19

What is the structure of the polymer which results when styrene is reacted with BF3 and H2O? 3 and H2O?   A) A B) B C) C D) D" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  A
B)  B
C)  C
D)  DE) A) and D)
F) All of the above

Question 20

The repeating unit of a polymer is shown below.This polymer is formed by

Accepted Answer

A)  addition of ethylene.
B)  addition of trans-2-butene.
C)  1,2 addition of butadiene.
D)  1,4 addition of butadiene.E) B) and D)
F) C) and D)

Exam 28: Synthetic Polymers

In which type of polymer are the chains packed less tightly together,resulting in lower melting points and a softer texture?

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Which one of the following monomers undergoes cationic polymerization most readily?

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Which of the following is (are) repeating unit(s) of step-growth polymers?

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Which one of the following monomers undergoes anionic polymerization most readily?

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The repeating unit of poly(methyl methacrylate) is shown below.Which one of the following is the monomer used to make poly(methyl methacrylate) ?

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Which of the following is the repeating unit of the polymer formed in the polymerization of p-hydroxybenzoic acid?

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What is the classification of the following polymer in which X and Y represent repeating units?

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Identify the monomer(s) needed to make the following polyester.

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Which of the following initiators can be used for anionic chain-growth polymerization?

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The acid-catalyzed dimerization of isobutylene gives a mixture of two isomeric alkenes,A and B.Hydrogenation of this mixture gives a single C8H18 hydrocarbon.What is the structure of this hydrocarbon?

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Which of the following is the repeating unit of the polymer formed in the polymerization reaction shown below?

Correct AnswerverifiedB

What is the name given to polymers with single monomers?

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Which of the following monomers yields the polymer shown below?

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Which of the following is the repeating unit in polyvinyl chloride (PVC) ?

Correct AnswerverifiedA

What modification occurs when a small amount of p-divinylbenzene is added to the polymerization reaction of styrene to form polystyrene? (Recall that the vinyl group is -CH=CH2.)

Correct AnswerverifiedA

What monomer(s) would be used to make the polyester shown below?

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Which of the following is (are) addition polymer(s) ? I.polypropylene II) Teflon III) nylon

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Rank the following monomers (X,Y and Z) in order of increasing ability to undergo anionic polymerization,starting with the least reactive monomer.

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What is the structure of the polymer which results when styrene is reacted with BF3 and H2O?

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The repeating unit of a polymer is shown below.This polymer is formed by

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The acid-catalyzed dimerization of isobutylene gives a mixture of two isomeric alkenes,A and B.Hydrogenation of this mixture gives a single C₈H₁₈ hydrocarbon.What is the structure of this hydrocarbon?

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B

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A

What modification occurs when a small amount of p-divinylbenzene is added to the polymerization reaction of styrene to form polystyrene? (Recall that the vinyl group is -CH=CH₂.)

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A

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What is the structure of the polymer which results when styrene is reacted with BF₃ and H₂O?

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