Question 1

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

Accepted Answer

Anionic chain-growth polymerization requires initiators that can generate a carbanion to start the polymerization. Option B is a typical anionic initiator that can produce the necessary carbanion for anionic polymerization. The other options are either radical initiators (options A and C) or coordination initiators (option D) that do not generate carbanions.

Question 2

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

Monomer B is methyl methacrylate, which is used to make poly(methyl methacrylate) through polymerization.

Question 3

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

Accepted Answer

Benzoyl peroxide is a free-radical initiator, which initiates the free-radical chain-growth polymerization process.

Question 4

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

Accepted Answer

The repeating unit in the polymer is shown in option B, where the monomer units are linked through the carbon-carbon double bonds to form a long chain polymer. Option A shows a different arrangement of monomer units, option C shows a branching structure, and option D shows a cyclical structure, none of which are formed in the given reaction sequence.

Question 5

Which of the following monomers yields the polymer shown below?

Accepted Answer

The polymer shown in the image has alternating units of phenylalanine and tyrosine, which are both amino acids. The monomer that yields amino acids is a carboxylic acid (choice B).

Question 6

Which of the following is used to make Teflon?

Accepted Answer

Teflon is made from the monomer tetrafluoroethylene.

Question 7

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

The answer of The monomer used to make superglue is...

Question 8

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

Accepted Answer

Benzoyl peroxide is commonly used as an initiator for free radical chain-growth polymerization reactions. The other options either do not function as initiators or are not commonly used in this type of polymerization.

Question 9

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

Accepted Answer

Atactic polymers have randomly oriented side groups, which result in chain packing that is less ordered and more open. This makes the polymer more amorphous and results in lower melting points and a softer texture. Isotactic and syndiotactic polymers have more ordered packing arrangements and typically have higher melting points and a more rigid texture. Cross-linked polymers involve chemical bonding between chains and would not have a significant impact on chain packing or melting points.

Question 10

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

The addition of p-divinylbenzene allows for cross-linking of the polystyrene chains, resulting in a more rigid and thermally stable material.

Question 11

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

Accepted Answer

Polypropylene and Teflon are addition polymers, formed by the addition reaction of their respective monomers. Nylon, however, is a condensation polymer, created by a condensation reaction where a small molecule, often water, is eliminated.

Question 12

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

Accepted Answer

Condensation polymers are characterized by the formation of a smaller molecule (such as water) during the polymerization process. Nylon is a condensation polymer, but polypropylene and Teflon are not.

Question 13

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

Accepted Answer

The answer of Which one of the following monomers undergoes...

Question 14

Which of the following monomers is used to make the polymer carbowax, shown below?

Accepted Answer

The answer of Which of the following monomers is used...

Question 15

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

Accepted Answer

The answer of Which of the following is the repeating...

Question 16

Which of the following initiators is used to make isotactic polypropylene?

Accepted Answer

Al(CH3)2Cl, TiCl4 is the Ziegler-Natta catalyst used for the polymerization of propylene to produce isotactic polypropylene.

Question 17

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

Accepted Answer

The monomer with a cyano group (CN) adjacent to the double bond, as in choice D, is more reactive towards anionic polymerization due to the electron-withdrawing nature of the cyano group, which stabilizes the negative charge on the growing polymer chain.

Question 18

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

The answer of The acid-catalyzed dimerization of isobutylene gives a...

Question 19

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

Accepted Answer

The answer of Which of the following best describes the...

Question 20

Which of the following is the monomer that gives the polymer shown below?

Accepted Answer

The answer of Which of the following is the monomer...

Quiz 30: Synthetic Polymers

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

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

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

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

Which of the following monomers yields the polymer shown below?

Which of the following is used to make Teflon?

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

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

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

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.)

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

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

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

Which of the following monomers is used to make the polymer carbowax, shown below?

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

Which of the following initiators is used to make isotactic polypropylene?

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

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 best describes the polymer chain shown below?

Which of the following is the monomer that gives the polymer shown below?

Quiz 30: Synthetic Polymers

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

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

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

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

Which of the following monomers yields the polymer shown below?

Which of the following is used to make Teflon?

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

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

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

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.)

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

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

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

Which of the following monomers is used to make the polymer carbowax, shown below?

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

Which of the following initiators is used to make isotactic polypropylene?

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

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 best describes the polymer chain shown below?

Which of the following is the monomer that gives the polymer shown below?

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.)

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?