Question 1

Which type of polymerization process uses benzoyl peroxide (or other peroxides)as an initiator?

Accepted Answer

A) Free-radical chain-growth 
B) Cationic chain-growth 
C) Anionic chain-growth 
D) Acid-catalyzed step-growth 
A) Free-radical chain-growth 
B) Cationic chain-growth 
C) Anionic chain-growth 
D) Acid-catalyzed step-growth A

Question 2

The monomer used to make superglue is shown below.Which of the following methods of polymerization is most suitable for this type of monomer?

Accepted Answer

A) Free-radical chain-growth 
B) Cationic chain-growth 
C) Anionic chain-growth 
D) Acid-catalyzed step-growth 
A) Free-radical chain-growth 
B) Cationic chain-growth 
C) Anionic chain-growth 
D) Acid-catalyzed step-growth C

Question 3

What type of polymer is Spandex?

Accepted Answer

A) HDPE 
B) Polyurethane 
C) Polycarbonate 
D) Polyamide 
A) HDPE 
B) Polyurethane 
C) Polycarbonate 
D) Polyamide B

Question 4

Vulcanization is the process of cross-linking polymer chains in rubber using what chemical?

Accepted Answer

A) Sulfur 
B) Formaldehyde 
C) Benzoyl peroxide 
D) Ethylene glycol 
A) Sulfur 
B) Formaldehyde 
C) Benzoyl peroxide 
D) Ethylene glycol

Question 5

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?

Accepted Answer

A) 2,2,4-Trimethylpentane 
B) 2,3,4-Trimethylpentane 
C) 2,4-Dimethylhexane 
D) 2,5-Dimethyhexane 
A) 2,2,4-Trimethylpentane 
B) 2,3,4-Trimethylpentane 
C) 2,4-Dimethylhexane 
D) 2,5-Dimethyhexane

Question 6

Which of the following sets of products results if nylon 66 is treated with sulfuric acid?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) 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 copolymer 
A) Block copolymer 
B) Homopolymer 
C) Alternating copolymer 
D) Random copolymer

Question 8

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=CHCN 
A) H2C=CH2 
B) H2C=CHCH3 
C) H2C=C(CH3)2 
D) H2C=CHCN

Question 9

Melamine and formaldehyde combine to form the polymer,Melmac®.How is Melmac® classified,and what physical characteristics are consistent with its structure?

Accepted Answer

A) Polycarbonate,transparent 
B) Polyurethane,elastic 
C) Thermosetting,rigid 
D) Thermoplastic,can be melted and molded into new shapes 
A) Polycarbonate,transparent 
B) Polyurethane,elastic 
C) Thermosetting,rigid 
D) Thermoplastic,can be melted and molded into new shapes

Question 10

Which of the following monomers yields the polymer shown below?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D

Question 11

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

Accepted Answer

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

Question 12

Which of the following is used to make Teflon?

Accepted Answer

A) Fluoroethene 
B) 1,1,4,4-Tetrafluorobutadiene 
C) 1,2-Difluoroethene 
D) Tetrafluoroethylene 
A) Fluoroethene 
B) 1,1,4,4-Tetrafluorobutadiene 
C) 1,2-Difluoroethene 
D) Tetrafluoroethylene

Question 13

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

Question 14

Identify the repeating unit in the polymer formed from the following reaction sequence.

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D

Question 15

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,TiCl4 
A) Benzoyl peroxide 
B) CH3CH2CH2CH2Li 
C) BF3 
D) Al(CH2CH3)3,TiCl4

Question 16

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

Accepted Answer

A) Benzoyl peroxide 
B) CH3CH2CH2CH2Li 
C) BF3 
D) Al(CH2CH3)3,TiCl4 
A) Benzoyl peroxide 
B) CH3CH2CH2CH2Li 
C) BF3 
D) Al(CH2CH3)3,TiCl4

Question 17

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

Question 18

What is the purpose of plasticizers?

Accepted Answer

A) To harden plastics 
B) To soften plastics 
C) To initiate polymerizations 
D) To cross-link polymer chains 
A) To harden plastics 
B) To soften plastics 
C) To initiate polymerizations 
D) To cross-link polymer chains

Question 19

What type of polymer is Lexan?

Accepted Answer

A) Epoxy 
B) Polyurethane 
C) Polycarbonate 
D) Polyamide 
A) Epoxy 
B) Polyurethane 
C) Polycarbonate 
D) Polyamide

Question 20

Which of the following best describes the polymer chain shown below?

Accepted Answer

A) Atactic polypropylene 
B) Isotactic polypropylene 
C) Syndiotactic polypropylene 
D) Cross-linked polypropylene 
A) Atactic polypropylene 
B) Isotactic polypropylene 
C) Syndiotactic polypropylene 
D) Cross-linked polypropylene

Exam 28: Synthetic Polymers

Which type of polymerization process uses benzoyl peroxide (or other peroxides)as an initiator?

The monomer used to make superglue is shown below.Which of the following methods of polymerization is most suitable for this type of monomer?

What type of polymer is Spandex?

Vulcanization is the process of cross-linking polymer chains in rubber using what chemical?

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?

Which of the following sets of products results if nylon 66 is treated with sulfuric acid?

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

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

Melamine and formaldehyde combine to form the polymer,Melmac®.How is Melmac® classified,and what physical characteristics are consistent with its structure?

Which of the following monomers yields the polymer shown below?

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

Which of the following is used to make Teflon?

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

Identify the repeating unit in the polymer formed from the following reaction sequence.

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

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

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

What is the purpose of plasticizers?

What type of polymer is Lexan?

Which of the following best describes the polymer chain shown below?

Structure and Bonding

Acids and Bases

Introduction to Organic Molecules and Functional Groups

Alkanes

Stereochemistry

Understanding Organic Reactions

Alkyl Halides and Nucleophilic Substitution

Alkyl Halides and Elimination Reactions

Alcohols,ethers,and Related Compounds

Alkenes and Addition Reactions

Alkynes and Synthesis

Oxidation and Reduction

Radical Reactions

Conjugation, resonance, and Dienes

Benzene and Aromatic Compounds

Reactions of Aromatic Compounds

Introduction to Carbonyl Chemistry; Organometallic Reagents; Oxidation and Reduction

Aldehydes and Ketones - Nucleophilic Addition

Carboxylic Acids and the Acidity of the O-H Bond

Carboxylic Acids and Their Derivatives - Nucleophilic Acyl Substitution

Substitution Reactions of Carbonyl Compounds at the a Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond-Forming Reactions in Organic Synthesis

Pericyclic Reactions

Carbohydrates

Amino Acids and Proteins

Lipids

Molecular Ion Peaks and Fragmentation Patterns

Analyzing Molecular Motion and Infrared Spectroscopy

Organic Spectroscopy Concepts

Filters

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?

Melamine and formaldehyde combine to form the polymer,Melmac^®.How is Melmac^® classified,and what physical characteristics are consistent with its structure?