Question 1

In an electrically conducting polymer,what is a "hole"?

Accepted Answer

In an electrically conducting polymer, a "hole" refers to a vacancy in the π molecular orbitals, which results from the removal of a π electron. This creates a localized positive charge in the polymer. Therefore, option D, "It is a π molecular orbital from which a π electron has been abstracted," is the best choice.

Question 2

The polymer  is formed by addition of which of the following?

Accepted Answer

E

Question 3

The polymer formed from ethylene glycol (HOCH₂CH₂OH)and1,3-propanedicarboxylic acid (HOOCCH₂COOH)is what type of polymer? I.addition polymer II.condensation polymer III.homopolymer IV.copolymer

Accepted Answer

The polymer formed from ethylene glycol and 1,3-propanedicarboxylic acid is a condensation polymer because its formation involves the elimination of a small molecule (water, in this case) when the monomers react. It is also a copolymer because it is made from two different types of monomers.

Question 4

What is the polymer formed by the condensation of ethylene glycol,HOCH₂CH₂OH,with 1,3-propanedicarboxylic acid,HOOCCH₂COOH?

Accepted Answer

The answer of What is the polymer formed by the...

Question 5

Which of the following pairs of substances could form a polyester?

Accepted Answer

Polyesters are synthesized through a condensation reaction between a diol (a molecule with two hydroxyl groups, -OH) and a dicarboxylic acid (a molecule with two carboxyl groups, -COOH). Option C presents a diol (HOCH2CH2OH) and a dicarboxylic acid (HOOCCOOH), which can react to form a polyester.

Question 6

What of the following polymers could be produced by the free-radical addition of 1,1-difluoroethylene,F₂C=CH₂?

Accepted Answer

The answer of What of the following polymers could be...

Question 7

Which of the following is not an electrically conducting polymer?

Accepted Answer

The answer of Which of the following is not an...

Question 8

Which of the following statements does not describe natural rubber?

Accepted Answer

Natural rubber is not a copolymer; it is a homopolymer, consisting of repeating isoprene units.

Question 9

For a free-radical addition polymerization,which of the following statements is true?

Accepted Answer

In free-radical addition polymerization, π-bonds in the monomers are broken and transformed into σ-bonds as they form the polymer chain. This process involves the addition of monomer units with π-bonds to the growing polymer chain, converting those π-bonds into σ-bonds in the polymer structure.

Question 10

What is the type of polymer formed when 1,5-pentanediol,HOCH₂CH₂CH₂CH₂CH₂OH,reacts with 1,6-hexanedicarboxylic acid,HOOCCH₂CH₂CH₂CH₂COOH?

Accepted Answer

The reaction of 1,5-pentanediol with 1,6-hexanedicarboxylic acid results in the formation of an ester linkage, making it a polyester.

Question 11

The amino acid L-lysine has the amine side chain R = −(CH₂)₄NH₂.At low pH,all ionizable groups are protonated.What is the net charge on this fully protonated form of L-lysine?

Accepted Answer

L-lysine has three ionizable groups: the amino group (NH3+), the carboxyl group (COOH), and the side chain amine group. At low pH, all these groups are protonated, giving a total net charge of +2 (NH3+ has +1, COOH is neutral, and the side chain NH3+ has +1).

Question 12

Which of the following combinations can produce a condensation polymer? (R and R' are alkyl groups)

Accepted Answer

The answer of Which of the following combinations can produce...

Question 13

What is the type of polymer formed when 1,4-butanecarboxylic acid,HOOCCH₂CH₂COOH,reacts with 1,4-diaminobutane,H₂NCH₂CH₂CH₂CH₂NH₂?

Accepted Answer

The reaction between 1,4-butanecarboxylic acid and 1,4-diaminobutane results in the formation of a polyamide, also known as a nylon polymer. The carboxylic acid group reacts with the amine group to form an amide bond, leading to the formation of a long chain polyamide. Therefore, option E is the correct answer.

Question 14

What is the polymer formed by the condensation of 1,3-propanedicarboxylic acid,HOOCCH₂COOH,with 1,2-diaminoethane,NH₂CH₂CH₂NH₂?

Accepted Answer

The polymer formed by the condensation of 1,3-propanedicarboxylic acid and 1,2-diaminoethane is a type of nylon, specifically nylon-3,3. The repeating unit can be represented as NH(CH2)3NHCO(CH2)3CO, which corresponds to choice C.

Question 15

Consider the polymer drawn below:  What monomer(s)could produce the above polymer?

Accepted Answer

The answer of Consider the polymer drawn below:  What...

Question 16

Which of the following is not an addition polymer?

Accepted Answer

Polyester is not an addition polymer, it is a condensation polymer. In condensation polymerization, small molecules such as water or hydrogen chloride are eliminated as the polymer is formed, while in addition polymerization, the polymer chains are formed by the addition of unsaturated monomers. A and B are addition polymers of vinyl chloride and ethylene, respectively, while C is an addition polymer of styrene, and D is an addition polymer of propylene.

Question 17

The side chain on the amino acid phenylalanine  is classified as

Accepted Answer

Phenylalanine has a nonpolar side chain due to the presence of a benzene ring, which is a hydrophobic group.

Question 18

For the addition polymer polyacrylonitrile shown below,what is the chemical structure of the monomer?

Accepted Answer

The answer of For the addition polymer polyacrylonitrile shown below,what...

Question 19

Elimination of a small molecule such as water is involved in formation of which type of polymer?

Accepted Answer

Elimination of a small molecule such as water is a characteristic feature of condensation polymerization. In this process, two different monomers combine to form a polymer with the release of a small molecule such as water, ammonia, or hydrogen chloride. This is in contrast to addition polymerization, where monomers add to each other without losing any small molecules. Free-radical polymerization involves the generation and propagation of free radicals to form polymers, and homo- and copolymers refer to the chemical arrangement of monomers in the polymer chain, not the mechanism of polymerization.

Question 20

The structure of the polymer used in a freezer wrap can mainly be described as follows: [CCl₂ -CH₂ -CCl₂ -CH₂ -CCl₂ -CH₂ -CCl₂ -CH₂]_n Which monomer could produce this polymer?

Accepted Answer

The polymer structure alternates between a chlorinated carbon unit and a hydrogenated carbon unit, which suggests that the monomer must contain both types of units ready for polymerization. Choice C, CCl2=CH2, correctly represents a monomer that could polymerize to form the given structure, with alternating chlorinated and hydrogenated carbon units.

Quiz 24: Polymer Materials: Synthetic and Biological

In an electrically conducting polymer,what is a "hole"?

The polymer is formed by addition of which of the following?

The polymer formed from ethylene glycol (HOCH₂CH₂OH) and1,3-propanedicarboxylic acid (HOOCCH₂COOH) is what type of polymer? I.addition polymer II.condensation polymer III.homopolymer IV.copolymer

What is the polymer formed by the condensation of ethylene glycol,HOCH₂CH₂OH,with 1,3-propanedicarboxylic acid,HOOCCH₂COOH?

Which of the following pairs of substances could form a polyester?

What of the following polymers could be produced by the free-radical addition of 1,1-difluoroethylene,F₂C=CH₂?

Which of the following is not an electrically conducting polymer?

Which of the following statements does not describe natural rubber?

For a free-radical addition polymerization,which of the following statements is true?

What is the type of polymer formed when 1,5-pentanediol,HOCH₂CH₂CH₂CH₂CH₂OH,reacts with 1,6-hexanedicarboxylic acid,HOOCCH₂CH₂CH₂CH₂COOH?

The amino acid L-lysine has the amine side chain R = −(CH₂) ₄NH₂.At low pH,all ionizable groups are protonated.What is the net charge on this fully protonated form of L-lysine?

Which of the following combinations can produce a condensation polymer? (R and R' are alkyl groups)

What is the type of polymer formed when 1,4-butanecarboxylic acid,HOOCCH₂CH₂COOH,reacts with 1,4-diaminobutane,H₂NCH₂CH₂CH₂CH₂NH₂?

What is the polymer formed by the condensation of 1,3-propanedicarboxylic acid,HOOCCH₂COOH,with 1,2-diaminoethane,NH₂CH₂CH₂NH₂?

Consider the polymer drawn below: What monomer(s) could produce the above polymer?

Which of the following is not an addition polymer?

The side chain on the amino acid phenylalanine is classified as

For the addition polymer polyacrylonitrile shown below,what is the chemical structure of the monomer?

Elimination of a small molecule such as water is involved in formation of which type of polymer?

The structure of the polymer used in a freezer wrap can mainly be described as follows: [CCl₂ -CH₂ -CCl₂ -CH₂ -CCl₂ -CH₂ -CCl₂ -CH₂]_n Which monomer could produce this polymer?

Quiz 24: Polymer Materials: Synthetic and Biological

In an electrically conducting polymer,what is a "hole"?

The polymer is formed by addition of which of the following?

The polymer formed from ethylene glycol (HOCH2CH2OH) and1,3-propanedicarboxylic acid (HOOCCH2COOH) is what type of polymer? I.addition polymer II.condensation polymer III.homopolymer IV.copolymer

What is the polymer formed by the condensation of ethylene glycol,HOCH2CH2OH,with 1,3-propanedicarboxylic acid,HOOCCH2COOH?

Which of the following pairs of substances could form a polyester?

What of the following polymers could be produced by the free-radical addition of 1,1-difluoroethylene,F2C=CH2?

Which of the following is not an electrically conducting polymer?

Which of the following statements does not describe natural rubber?

For a free-radical addition polymerization,which of the following statements is true?

What is the type of polymer formed when 1,5-pentanediol,HOCH2CH2CH2CH2CH2OH,reacts with 1,6-hexanedicarboxylic acid,HOOCCH2CH2CH2CH2COOH?

The amino acid L-lysine has the amine side chain R = −(CH2) 4NH2.At low pH,all ionizable groups are protonated.What is the net charge on this fully protonated form of L-lysine?

Which of the following combinations can produce a condensation polymer? (R and R' are alkyl groups)

What is the type of polymer formed when 1,4-butanecarboxylic acid,HOOCCH2CH2COOH,reacts with 1,4-diaminobutane,H2NCH2CH2CH2CH2NH2?

What is the polymer formed by the condensation of 1,3-propanedicarboxylic acid,HOOCCH2COOH,with 1,2-diaminoethane,NH2CH2CH2NH2?

Consider the polymer drawn below: What monomer(s) could produce the above polymer?

Which of the following is not an addition polymer?

The side chain on the amino acid phenylalanine is classified as

For the addition polymer polyacrylonitrile shown below,what is the chemical structure of the monomer?

Elimination of a small molecule such as water is involved in formation of which type of polymer?

The structure of the polymer used in a freezer wrap can mainly be described as follows: [CCl2 -CH2 -CCl2 -CH2 -CCl2 -CH2 -CCl2 -CH2]n Which monomer could produce this polymer?

The polymer formed from ethylene glycol (HOCH₂CH₂OH) and1,3-propanedicarboxylic acid (HOOCCH₂COOH) is what type of polymer? I.addition polymer II.condensation polymer III.homopolymer IV.copolymer

What is the polymer formed by the condensation of ethylene glycol,HOCH₂CH₂OH,with 1,3-propanedicarboxylic acid,HOOCCH₂COOH?

What of the following polymers could be produced by the free-radical addition of 1,1-difluoroethylene,F₂C=CH₂?

What is the type of polymer formed when 1,5-pentanediol,HOCH₂CH₂CH₂CH₂CH₂OH,reacts with 1,6-hexanedicarboxylic acid,HOOCCH₂CH₂CH₂CH₂COOH?

The amino acid L-lysine has the amine side chain R = −(CH₂) ₄NH₂.At low pH,all ionizable groups are protonated.What is the net charge on this fully protonated form of L-lysine?

What is the type of polymer formed when 1,4-butanecarboxylic acid,HOOCCH₂CH₂COOH,reacts with 1,4-diaminobutane,H₂NCH₂CH₂CH₂CH₂NH₂?

What is the polymer formed by the condensation of 1,3-propanedicarboxylic acid,HOOCCH₂COOH,with 1,2-diaminoethane,NH₂CH₂CH₂NH₂?

The structure of the polymer used in a freezer wrap can mainly be described as follows: [CCl₂ -CH₂ -CCl₂ -CH₂ -CCl₂ -CH₂ -CCl₂ -CH₂]_n Which monomer could produce this polymer?