Polymer Chemistry Textbook Exam Questions - 3751 Verified Questions by Quizplus

Polymer Chemistry

Textbook Exam Questions

Course Introduction

Polymer Chemistry explores the synthesis, structure, properties, and applications of polymers, both natural and synthetic. This course covers the fundamental mechanisms of polymerization including step-growth and chain-growth processes alongside the characterization techniques used to analyze polymer molecular weight, morphology, and thermal behaviors. Students will examine the relationship between chemical structure and the physical properties of polymers, such as elasticity, plasticity, and biocompatibility. Additionally, the course addresses recent advancements in sustainable polymers and their impact on materials science, industry, and everyday life.

Recommended Textbook

Organic Chemistry 3rd Edition by David R. Klein

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27 Chapters

3751 Verified Questions

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Chapter 1: A Review of General Chemistry: Electrons, Bonds, and Molecular Properties

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Sample Questions

Q1) According to molecular orbital theory, the constructive interference of two atomic orbitals results in a(n) _______.

Answer: bonding molecular orbital

Q2) Constitutional isomers do not differ in ____________.

A) physical properties

B) atomic connectivity

C) molecular formula

D) name

E) constitution

Answer: C

Q3) Draw three constitutional isomers that have molecular formula C4H8O.

Answer: 11ea894b_ac39_c1b4_bba7_65bf2b2a5852_TB4454_00_TB4454_00 There are additional correct answers

Q4) Identify the compound with the longest carbon - nitrogen bond.

A) CH3CH2CH=NH

B) CH3CH2NH2

C) CH3CH2C N

D) The length of the carbon-nitrogen bonds are the same Answer: B

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Chapter 2: Molecular Representations

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Sample Questions

Q1) Diazomethane has the molecular formula CH2N2. Draw the preferred Lewis structure for diazomethane and assign formal charges to all atoms except hydrogen.

Answer: 11ea894b_ac61_46d3_bba7_33dd416c8850_TB4454_00_TB4454_00

Q2) Draw a bond-line structure for CH3C C(CH2)3C(CH3)2C H2OCH3.

Answer: 11ea894b_ac59_f396_bba7_81bf1cc783ac_TB4454_00_TB4454_00

Q3) Draw all the constitutional isomers with a molecular formula of C3H6O and label the functional groups in each isomer.

Answer: 11ea894b_ac5d_9d38_bba7_d92c94e321f0_TB4454_00_TB4454_00 11ea894b_ac5d_c449_bba7_671896bd267a_TB4454_00_TB4454_00

Q4) Draw a bond-line structure for each constitutional isomer with molecular formula C4H11N.

Answer: 11ea894b_ac5a_b6ed_bba7_e335e41aa83f_TB4454_00_TB4454_00 11ea894b_ac5a_b6ee_bba7_09cf9b264767_TB4454_00_TB4454_00

Q5) Draw the resonance hybrid of C6H6.

Answer: 11ea894b_ac68_7222_bba7_55525f20a2a7_TB4454_00_TB4454_00

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Chapter 3: Acids and Bases

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Sample Questions

Q1) Draw the conjugate base of CH3CH2NH2.

Answer: 11ea894b_ac6b_0a51_bba7_6bee57bb5622_TB4454_00_TB4454_00

Q2) Draw the conjugate acid of CH3CH2OH.

Answer: 11ea894b_ac6a_bc2c_bba7_eba66b89b0d7_TB4454_00_TB4454_00

Q3) What is the leveling effect?

Answer: It is the deprotonation of a solvent by a base or protonation of solvent by an acid.

Q4) In a Brønsted-Lowry acid-base reaction, the products are _______.

A) Brønsted-Lowry acid and Brønsted-Lowry base

B) Brønsted-Lowry acid and conjugate base

C) Brønsted-Lowry base and conjugate acid

D) conjugate acid and conjugate base

E) Brønsted-Lowry acid and conjugate acid

Answer: D

Q5) Which of the following compounds is more acidic? Explain why.

HF and HBr

Answer: HBr is more acidic than HF. The Br- ion has larger ionic size than the F- ion, which allows for spreading of charge over a larger volume of space. This results in a more stable anion and a weak conjugate base. HF also participates in hydrogen bonding and is a weak acid.

Page 5

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Chapter 4: Alkanes and Cycloalkanes

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Sample Questions

Q1) What is the structure of an isopropyl group?

Q2) Give the structures and IUPAC names of all constitutional isomers of C6H14.

Q3) Draw the lowest energy chair conformer of the most stable isomer of 4-isopropyl-1,2-dimethylcyclohexane.

Q4) Identify the size of the hydrocarbon that is used in jet fuel.

A) C1 - C4

B) C5 - C12

C) C12 - C18

D) C12 and higher

Q5) Draw a chair conformation of ethylcyclohexane with the ethyl group axial.

Q6) What is the eclipsing cost of Br and H if the energy difference between the staggered and eclipsed conformations of bromoethane is 13 kJ/mol?

Q7) What is the structure of 3-ethyl-3-methylpentane?

Q8) Draw a chair conformation of cyclohexane showing all of the equatorial H's.

Q9) Draw an energy diagram for the conformational analysis of propane.

Q10) What is the energy difference between the staggered and eclipsed conformations of 2,2,-dimethylpropane if the eclipsing cost of Me and H is 6 kJ/mol?

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Chapter 5: Stereoisomerism

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Sample Questions

Q1) Stereoisomers that result from the hindered rotation of a single bond are called

Q2) Rank the following from highest to lowest priority according to the Cahn-Ingold-Prelog system.

I. -CH2CH3 II. -CHCH2 III. -CCH IV. -CH3

Q3) Draw the structure of the compound (S)-3-methylheptane.

Q4) What is the percentage of the R enantiomer in a sample of limonene that has a specific rotation of 38, given that the specific rotation of (S)-limonene is 116?

Q5) If a sample of carvone gives a specific rotation of 0 and the specific rotation of pure (R)-carvone is 61, what is the configuration of the unknown sample?

Q6) Draw the structure of the compound (R)-4-ethyloctane.

Q7) If a sample of carvone gives a specific rotation of 60 and the specific rotation of (R)-carvone is 61, does the unknown sample primarily have the R or S absolute configuration?

Q8) Draw all the isomers with molecular formula C4H6.

Q9) Draw all possible stereoisomers of 1,3,5-trimethylcyclohexane.

Q10) Draw all the isomers with molecular formula C4H8.

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Chapter 6: Chemical Reactivity and Mechanisms

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Sample Questions

Q1) Which of the following indicates a reaction with a positive G?

A) endergonic, spontaneous

B) endergonic, not spontaneous

C) exergonic, spontaneous

D) exergonic, not spontaneous

Q2) Which of the following indicates a reaction with a negative G?

A) endergonic, spontaneous

B) endergonic, not spontaneous

C) exergonic, spontaneous

D) exergonic, not spontaneous

Q3) What is a transition state?

A) An isolable intermediate in a reaction.

B) The starting materials of the reaction.

C) A local maximum on the energy diagram.

D) A low-energy point between the starting materials and the product.

Q4) Predict the sign of G for an endothermic reaction with an increase in entropy.

A) positive

B) negative

C) no change

D) cannot predict without additional information

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Chapter 7: Alkyl Halides: Nucleophilic Substitution and Elimination Reactions

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Sample Questions

Q1) Draw the structure of 2,3-dimethyl-1-pentene.

Q2) What set of reaction conditions would favor an SN1 reaction on 2-bromo-3-methylbutane?

A) weak nucleophile in a protic solvent

B) weak nucleophile in an aprotic solvent

C) strong nucleophile in a protic solvent

D) strong nucleophile in an aprotic solvent

Q3) Which pattern of arrow pushing is associated with the first step in any dehydration reaction?

Q4) Draw the structure of 3-methylcyclopentene.

Q5) Which of the following is a tertiary alkyl halide?

A) (CH3)2CHCH2Cl B) (CH3)2CClCH2CH3 C) (CH3)2CHCHClCH3 D)

(CH3)2CHCH2CHClCH2CH3</su b>

Q7) Draw the E isomer of 2-methyl-3-heptene. Page 9

Q6) Draw the isomer of 2-bromo-1,1,3-trimethylcyclohexane that would be more reactive in an E2 elimination.

Q8) Provide the structure for (4R,8S)-4-iodo-2,2,8-trimethyldecane.

Q9) Provide the structure for cis-1,2-dibromocyclopentane.

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Chapter 8: Addition Reactions of Alkenes

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Sample Questions

Q1) For the complete reduction of 1 mole of 3E,5E.-hepta-1,3,5-triene with H2 using a Pd catalyst, how many moles of H2 are consumed?

A) 1

B) 2

C) 3

D) 4

E) 5

Q2) Addition reactions of alkenes are characterized by _________.

A) formation of a bond

B) addition of two groups across a double bond

C) breaking of a bond

D) A and B

E) B and C

Q3) The rule that correctly predicts the regiochemistry of most ionic additions to alkenes is named after which chemist?

Q4) The alkene precursor to ethanol is __________.

Q5) The alkene precursor to acetone is __________.

Q6) Most bonds are quite prone to reaction with an ____________________, also referred to as electron-seeking reagents.

Page 11

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Chapter 9: Alkynes

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Sample Questions

Q1) How many distinct eight-carbon hydrocarbon products would be formed in the complete hydrogenation of a mixture of 1-octyne, 2-octyne, and 3-octyne, in the presence of a palladium catalyst?

A) 1

B) 2

C) 3

D) 6

E) 8

Q2) Of the species listed below, select those less basic than acetylide.

A) BuLi

B) NaNH2

C) NaOCH3

D) both A and C

E) both B and C

Q3) Select the best reagent expected to convert 3-heptyne to cis-3-heptene.

A) NaNH2, NH3

B) Na, NH3

C) H2, Lindlar's catalyst

D) Both A and C

E) Both B and C

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Chapter 10: Radical Reactions

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Sample Questions

Q1) Give the arrows to show the propagation steps for the autooxidation of diethyl ether.

Q2) One possible product of thermal cracking of hexane is 1-butene. Draw arrows to suggest a possible mechanism for this process starting from an alkyl radical.

Q3) Propose a synthesis of 3,4-dimethyl-2-pentanol using 2-methyl-2-butene and ethanol as your sources of carbon.

Q4) When 1,1,4-trimethylcyclohexane is exposed to Br2 and UV light, only one major product is obtained. How many distinct resonances in the proton-decoupled 13C NMR spectrum are observed in the product?

Q5) Identify an example of termination.

A) homolytic cleavage

B) heterolytic cleavage

C) hydrogen abstraction

D) coupling

E) hydrogen addition

Q6) Draw the arrows to show the propagation steps in the chlorination of propane to produce 2-chloropropane.

Q7) Propose a synthesis of 2-methylpropene from 2-methylpropane.

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Chapter 11: Synthesis

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Sample Questions

Q1) Devise a synthetic route to prepare 3-bromo-1-propanol from propene.

Q2) Devise a synthetic route to prepare 1,3-dibromopropan-2-ol from propene.

Q3) Identify the best solvent for Green Chemistry.

A) methylene chloride

B) water

C) ethanol

D) methanol

E) ethyl acetate

Q4) For multi-step reactions, which is the best method?

A) two steps

B) three steps

C) four steps

D) five steps

E) six steps

Q5) Starting with a primary alkyl bromide, which of the following results in an overall decrease in the length of the carbon skeleton by one carbon?

A) substitute bromide with acetylide, then cleave the triple bond

B) substitute bromide with acetylide, then reduce the alkyne to an alkene

C) substitute bromide with methoxide

D) eliminate hydrogen bromide to produce an alkene, then cleave the double bond

Page 14

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Chapter 12: Alcohols and Phenols

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Sample Questions

Q1) Provide the structure for 5-chloro-2-propyl-1-heptanol.

Q2) Identify the type of bonding between molecules of alcohol.

A) ion-ion

B) van der Waals forces

C) hydrogen bonding

D) ion-dipole

E) London dispersion

Q3) Identify wood alcohol.

A) methanol

B) 2-propanol

C) ethanol

D) 1-butanol

E) 1-propanol

Q4) Identify rubbing alcohol.

A) methanol

B) 2-propanol

C) ethanol

D) 1-butanol

E) 1-propanol

Q5) Give the structure for (E)-4,5,5-trimethyl-3-hepten-1-ol.

Page 15

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Chapter 13: Ethers and Epoxides; Thiols and Sulfides

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Sample Questions

Q1) Provide the structure for 2-iodo-4-isopropyl-1-methoxybenzene.

Q2) What is the IUPAC name for CH3CH2CH2CH2OCH2CH 3?

A) 1-ethoxybutane

B) 1-butoxyethane

C) ethyl butyl ether

D) 1-ethoxyhexane

E) none of these

Q3) Can you prepare diisopropyl ether as the major product by heating 2-propanol in the presence of sulfuric acid? Explain your answer.

Q4) Provide the structure for (R)-2,2,3-trimethyl-3-phenyloxirane.

Q5) Provide the structure for oxane.

Q6) Provide the structure for (2S,5R)-5-ethoxy-2-octanol.

Q7) Which of the following crown ether solvates sodium ions?

A) 12-crown-5

B) 12-crown-4

C) 15-crown-5

D) 18-crown-6

E) none of these

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Chapter 14: Infrared Spectroscopy and Mass Spectrometry

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Sample Questions

Q1) Which of the following wavenumber corresponds to the C=O double bond region on an IR spectrum?

A) 1500 - 4000 cm-1

B) 400 - 4000 cm-1

C) 400 - 1500 cm-1

D) 2100 - 2300 cm-1

E) 1600 - 1850 cm-1

Q2) Calculate the degree of unsaturation for C11H8ClBrO.

A) 4

B) 6

C) 7

D) 8

E) 10

Q3) Provide a molecular formula that is consistent with the following mass spectral data. M+ at m/z = 167, relative height = 50.0% (M+1)+ at m/z = 168, relative height = 4.4%

Q4) Warmer objects emit more __________ radiation.

Q5) Propose a possible structure for a compound with molecular formula C6H5Br.

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Chapter 15: Nuclear Magnetic Resonance Spectroscopy

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Sample Questions

Q1) Which of the following compounds gives a 1H NMR spectrum consisting of only a singlet?

A) 1,1-dichloropropane

B) 1,3-dichloropropane

C) 1,2-dichloropropane

D) 2,2-dichloropropane

E) 1-chloropropane

Q2) Which of the following displays a negative signal in the DEPT-135 13C NMR spectroscopy?

A) CH3

B) CH2

C) CH

D) C

E) none of these

Q3) The ADVANCE \u 21 ADVANCE \d 2H NMR spectrum of ethanamine (CH3CH2NH2) displays a singlet for the NH2 protons instead of a triplet. Explain why.

Q4) List the most common nuclei that are used in NMR.

Q5) NMR is an abbreviation for ____________ ____________ __________.

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Chapter 16: Conjugated Pi Systems and Pericyclic Reactions

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Sample Questions

Q1) Identify the isolated dienes.

A) 4-methyl-1,3-heptadiene

B) 3-methyl-1,5-heptadiene

C) 2-methyl-2,4-heptadiene

D) 4-methyl-1,4-heptadiene

E) 5-methyl-2,3-heptadiene

Q2) Identify the color of a compound that absorbs yellow light.

A) orange

B) green

C) red

D) blue

E) violet

Q3) How many electrons does the HOMO of 2,4-hexadiene have in its ground state?

A) 1

B) 2

C) 3

D) 4

E) 0

Q4) The reaction of 1,3-butadiene with hydrogen halide at 0°C will undergo _____ -addition under ____________ control.

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Chapter 17: Aromatic Compounds

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Sample Questions

Q1) According to the molecular orbital theory how many molecular orbitals are formed when the six p-orbitals of benzene combine?

A) 6

B) 5

C) 4

D) 3

E) 2

Q2) According to molecular orbital theory, how many non-bonding molecular orbitals does benzene have?

A) 0

B) 1

C) 2

D) 3

E) 4

Q3) Which of the following annulenes is not aromatic?

A) [6]-annulene

B) [14]-annulene

C) [16]-annulene

D) [18]-annulene

E) [22]-annulene

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Chapter 18: Aromatic Substitution Reactions

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Sample Questions

Q1) Which one of the following compounds will be most reactive towards an electrophilic aromatic bromination reaction?

A) nitrobenzene

B) anisole

C) acetanilide

D) benzene

E) benzaldehyde

Q2) Provide the structures of the major resonance contributors when nitrobenzene reacts with an electrophile in electrophilic aromatic substitution at the meta position.

Q3) Identify the mechanism by which benzene reacts with bromine.

Q4) Which one of the following compounds does not undergo a Friedel-Crafts reaction?

A) benzene

B) chlorobenzene

C) nitrobenzene

D) toluene

E) t-butylbenzene

Q5) Provide a stepwise curved arrow mechanism for the chlorination of benzene in the presence of FeCl3.

Q6) Give the preferred products from the nitration of bromobenzene.

Page 21

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Chapter 19: Aldehydes and Ketones

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Sample Questions

Q1) Provide the structure for m-nitroacetophenone.

Q2) Suggest a stepwise synthesis for 3-phenylpropanal from benzyl alcohol.

Q3) Suggest a stepwise synthesis for 5-methyl-2-hexanone from 3-methyl-1-bromobutane.

Q4) A compound with an OH and an OR group attached to the same carbon is known as ______.

A) an acetal

B) a hemiacetal

C) a hydrate

D) a vicinal hydrate

E) none of these

Q5) Suggest a stepwise synthesis for 1-pentanol from butanal.

Q6) Provide the structure of the ylide needed to prepare 3-ethyl-3-heptene from 3-pentanone using a Wittig reaction.

A) Ph3P=CH(CH2CH3)2

B) Ph3P=CHCH2CH3

C) Ph3P=CHCH2CH2CH3

D) Ph3P=CH2

E) Ph3P=CHCH2(CH3)2

Q7) Provide the structure for 2,3-dimethyl-2-octen-4-one.

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Chapter 20: Carboxylic Acids and Their Derivatives

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Q1) Propose a stepwise synthesis for N-propylbutanamide, using 1-proanol and/or carbon dioxide as your only source of carbon and any other reagents necessary.

Q2) Provide the structure for N-methylcyclohexanecarboxamide.

Q3) Provide the structure for benzoic ethanoic anhydride.

Q4) Which one of the following compounds has the highest boiling point?

A) butanoic acid

B) 1-butanol

C) 2-butanone

D) methoxyethane

E) butanal

Q5) Provide the structure for 3-ethylbenzonitrile.

Q6) Provide the structure for acetic formic anhydride.

Q7) Give the IUPAC name for oxalic acid.

A) ethanedioic acid

B) propanedioic acid

C) butanedioic acid

D) pentanedioic acid

E) benzoic acid

Page 23

Q8) Provide the structure for (3S,4S)-3-hydroxy-4-phenylnonanoic acid.

Q9) Provide the structure for benzoyl chloride.

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Chapter 21: Alpha Carbon Chemistry: Enols and Enolates

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Sample Questions

Q1) Give the name of the reaction in which a carboxylic acid can undergo alpha halogenation.

Q2) Identify a reactive starting material in the Claisen condensation.

A) 3-pentanone

B) butanal

C) ethyl butanoate

D) 1-propanol

E) propanoic anhydride

Q3) Which of the following ketones will give a positive haloform test?

A) 3-heptanone

B) 3-hexanone

C) cyclohexanone

D) 2-pentanone

E) 2-methyl-3-hexanone

Q4) Explain why CH3ONa should not be used for Claisen condensation of ethylbutanoate.

Q5) An intermolecular Claisen condensation is called a _____________.

Q6) Give the organic by-product in a haloform reaction.

Q7) Provide the structure of the enol when 3,3,6-trimethyl-4-heptanone is treated with acid.

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Chapter 22: Amines

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Sample Questions

Q1) Provide a stepwise synthesis of 3-amino-2-methylpentane using the Gabriel synthesis.

Q2) Identify the strongest base.

A) 4-chloroaniline

B) 4-nitroaniline

C) 4-aminobenzonitrile

D) aniline

E) 4-aminoanisole

Q3) What is the structure for 3-chloro-N-ethyl-1-pentanamine?

Q4) What is the structure for N-ethylbenzylamine?

Q5) The ________ reaction is used to prepare primary amines by using potassium phthalimide. This reaction proceeds by a ________ mechanism.

Q6) Provide the reagents necessary to convert (S)-3-methyl-3-phenylpentanoic acid to (S)-3-methyl-3-phenylpentanamine.

Q7) Provide a stepwise synthesis of 1-cyclopentylethanamine using the Gabriel synthesis.

Q8) What is the structure for N,N-diethylaniline?

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Chapter 23: Introduction to Organometallic Compounds

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Sample Questions

Q1) The reaction of a carbene with an alkene to make a cyclopropane commonly goes through which type mechanism?

A) proton transfer

B) loss of leaving group

C) cycloaddition

D) -elimination

Q2) Which of the following compounds has the most nucleophilic carbon atom?

A) CH3Cl

B) CH3Li

C) (CH3)2Zn

D) (CH3)2Cu

Q3) Treatment of chloroform (CHCl3) with strong bases results in _______ which is mechanistically described as a_______.

A) -elimination; loss of leaving group followed by deprotonation.

B) -elimination; deprotonation followed by a loss of leaving group.

C) -elimination; deprotonation followed by loss of leaving group.

D) -elimination; concerted deprotonation and loss of leaving group.

Q4) Why is ethanol not a viable solvent in the synthesis of Grignard reagents?

Q5) Explain why the solvent for a Grignard reaction must be free of water.

Q6) Each intermediate in alkene metathesis is formed by _____ cycloaddition

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Chapter 24: Carbohydrates

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Q1) A monosaccharide with five carbon atoms and a ketone functional group is called a(n) _____.

A) aldose

B) ketohexose

C) aldopentose

D) ketopentose

E) pentose

Q2) Identify the monosaccharide(s) in \(\beta\)-cellobiose.

Q3) Anomers of D-glucopyranose differ in stereochemistry at ____ carbon.

A) C1

B) C2

C) C3

D) C4

E) C5

Q4) Which of the following disaccharides is(are) \(\beta\)-galactoside(s)?

A) sucrose

B) maltose

C) lactose

D) cellobiose

E) both A and B

Page 28

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Chapter 25: Amino Acids, Peptides, and Proteins

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133 Verified Questions

133 Flashcards

Source URL: https://quizplus.com/quiz/72943

Sample Questions

Q1) How will you prepare phenylalanine using a Hell-Volhard-Zelinski reaction?

Q2) Identify how disulfide bonds are formed.

A) oxidation of thiol groups

B) joining cysteine residues within a peptide

C) joining cysteine residues between two strands of a peptide

D) all of these

Q3) Provide the structure of the predominant form of valine at pH 10?

Q4) Denaturation is ______.

A) irreversible

B) reversible with heat

C) reversible with a catalyst

D) reversible with UV

E) reversible under the same conditions

Q5) Which of the following results after three steps of Edman degradation of the heptapeptide Lys-His-Gly-Phe-Tyr-Ser-Ala?

A) Lys-His-Gly

B) Phe-Tyr-Ser-Ala

C) Tyr-Ser-Ala

D) Lys-His-Gly-Phe

E) Gly-Phe-Tyr-Ser-Ala

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Chapter 26: Lipids

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123 Verified Questions

123 Flashcards

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Sample Questions

Q1) Which one of the following fatty acids has the highest melting point?

A) stearic acid

B) palmitic acid

C) lauric acid

D) arachidic acid

E) oleic acid

Q2) Provide the structure of an optically active triglyceride that produced two myristic acid residues and an oleic acid residue when heated in the presence of an acid.

Q3) Identify the substance that can be made from heating animal fat with wood ashes, which contain alkaline substances.

A) detergent

B) soap

C) cooking oil

D) kerosene

E) biodiesel

Q4) Provide the structure of a cephalin that would produce two oleic acid residues on hydrolysis?

Q5) ______lipids do not undergo hydrolysis in the presence of aqueous acid or base.

Q6) Male sex hormones are called ______ and female sex hormones are called ____.

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Chapter 27: Synthetic Polymers

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119 Verified Questions

119 Flashcards

Source URL: https://quizplus.com/quiz/72945

Sample Questions

Q1) Which of the following types of polyethylene is used to make trash bags?

A) HDPE

B) LDPE

C) MDPE

D) A and C

E) none of these

Q2) The melt transition temperature (Tm), is the temperature at which the ________ regions of the polymers become ________.

A) crystalline, amorphous

B) amorphous, hard

C) crystalline, hard

D) non-crystalline, soft

E) none of these

Q3) Which one of the following is the best classification of crystalline polymers with high tensile strength?

A) fibers

B) elastomers

C) plasticizers

D) thermoplastics

E) thermosetting resins

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