Question 1

Skin,hair,muscle,and enzymes are all made of protein,which is a natural polymer.Proteins are

Accepted Answer

Proteins are made of amino acids, which are linked together by peptide bonds to form a long chain called a polypeptide. Polypeptides are considered polyamides because they contain amide bonds (-CO-NH-) between the amino acids. Polyester (A) refers to a polymer with ester bonds, while polyethylene (B) and polyalcohol (D) both refer to different types of polymers that are not commonly found in natural proteins.

Question 2

This symbol  is found on the bottom of a Coke bottle.What does the number mean?

Accepted Answer

The symbol 11ea68f2_c304_891e_b0a4_0155cf96bec3_TB1396_00 on the bottom of a Coke bottle indicates that it is made from PET (polyethylene terephthalate) plastic, which is a recyclable material. The code number is used by recycling facilities to sort the materials for recycling. Therefore, option A is correct.

Question 3

Which raw material serves as the source for most polymers?

Accepted Answer

Crude oil serves as the source for most polymers because it contains hydrocarbons which can be polymerized to form various types of polymers such as polyethylene, polypropylene, and PVC. Other sources such as natural gas and minerals are not as commonly used as crude oil. Salts can be used to form certain types of polymers but are not the primary source.

Question 4

Proteins are polymers of amino acids held together by bonds.

Accepted Answer

Peptide bonds link amino acids together to form proteins, making them the correct type of bond in this context.

Question 5

Adipic acid,one of the monomers used to make nylon,has a total of six carbon atoms with two carboxylic acid functional groups.Which structure is correct?

Accepted Answer

The correct structure for adipic acid is HOOC(CH2)4COOH, option C matches this structure. Option A has an additional atom not found in adipic acid. Option B has hydroxyl (-OH) functional groups instead of carboxylic acid (-COOH) functional groups. Option D has an additional functional group (-NH) not found in adipic acid.

Question 6

This pie chart gives the composition by weight of municipal solid waste (MSW) before recycling in 2008.  Which of the following statements is not true?

Accepted Answer

The answer of This pie chart gives the composition by...

Question 7

Every year about 100 billion pounds of plastic are produced in the United States (over 350 pounds for every woman,man,and child).What strategies may be employed to reduce the amount of plastics going into landfills?

Accepted Answer

All of these choices are correct because incineration can reduce the volume of waste, biodegradation can naturally break down plastic materials, and recycling can repurpose plastics into new products, all contributing to reducing the amount of plastics entering landfills.

Question 8

Incineration of plastics can be used to generate energy.One of the "big six" plastics releases hydrochloric acid,HCl,when incinerated.Which one?

Accepted Answer

PVC (polyvinyl chloride) is the plastic that releases hydrochloric acid when incinerated due to the presence of chlorine in its structure. Therefore, incinerating PVC can be harmful to the environment without proper precautions. LDPE (low-density polyethylene), PET (polyethylene terephthalate), and PS (polystyrene) do not contain chlorine and are safer to incinerate.

Question 9

Which atoms are present in all proteins?

Accepted Answer

All proteins contain the elements carbon (C), hydrogen (H), oxygen (O), and nitrogen (N).

Question 10

This symbol  is an example of the coding symbols found on packaging materials.These symbols let consumers know

Accepted Answer

The symbol 11ea68f2_c304_891d_b0a4_9f3d69a4dadb_TB1396_00 is the symbol for the recycling code 7, which means "other plastics". This symbol indicates to consumers how to recycle the package, by identifying the type of plastic it is made of.

Question 11

What is biodegradation?

Accepted Answer

Biodegradation is the process of breaking down organic substances by using microorganisms, such as bacteria and fungi, into simpler biocompatible substances. Choice A is incorrect because breaking up plastics into small pieces is not the same as biodegradation. Choice C is incorrect because biodegradation can occur with both natural and synthetic polymers. Choice D is incorrect because not all polymers can be broken down into carbon dioxide and water through biodegradation.

Question 12

Nathaniel Wayeth,developer of the plastic soft drink bottles,dreamed of the day when we will be able to melt down plastic bottles,reinforce the fibers and make car bodies.Then when we are done with the cars,melt down the car bodies and make bottles out of them.This would be an ultimate example of

Accepted Answer

This is an example of recycling, as the plastic bottles and car bodies would be melted down and turned into new products instead of being discarded as waste. Biodegradation is the breakdown of organic materials by natural processes, which isn't applicable in this scenario. Incineration involves burning waste, which isn't mentioned in the scenario. Reuse involves using a product multiple times for its original purpose, which also isn't applicable in this scenario.

Question 13

Which functional groups are present in all amino acids?

Accepted Answer

All amino acids contain both an amine group (–NH2) and an acid group (–COOH).

Question 14

One of the monomers used to make nylon is 1,6-diaminohexane (also known as hexamethylene diamine).How many amine ( - NH₂) groups does it have?

Accepted Answer

The name 1,6-diaminohexane indicates that there are two amine (-NH2) functional groups in the molecule, located at the 1 and 6 carbon atoms. Each amine group consists of one nitrogen atom (N) and two hydrogen atoms (H), represented as -NH2. Therefore, the answer is C.

Question 15

PET (polyethylene terephthalate) is classified as a polyester because

Accepted Answer

PET contains many ester linkages, which are formed by the condensation reaction between ethylene glycol and terephthalic acid. This makes PET a polyester.

Question 16

This is a representation of a plastic bag being stretched.Which statement best describes what is happening in the figure?

Accepted Answer

When a plastic bag is stretched, the molecules within the polymer chains start to align themselves parallel to the direction of the pulling force. As a result, the bag becomes thinner and longer. However, the stretching is only temporary, and unless the plastic is heated and cooled in this new orientation, it will return to its original shape once the force is released. Cross-linking (B) and branching (C) can occur in some types of plastic, but they are not the primary mechanism at work in plastic stretching. Option D is also incorrect as the stretching is not a temporary distortion.

Question 17

Nylon is classified as a polyamide because it contains which of the following linkages?

Accepted Answer

The answer of Nylon is classified as a polyamide because...

Question 18

Will synthetic polymers always have to be made from crude oil?

Accepted Answer

There are currently new technologies being developed that use bio-based raw materials to produce synthetic polymers, which means that crude oil will not always be the only source for their production.

Question 19

When I and II react together to make nylon,what are the products of the first condensation reaction?

Accepted Answer

The answer of When I and II react together to...

Question 20

These are the densities of some common plastics: PET 1.38 to 1.39 g/mL;HDPE 0.95 to 0.97 g/mL;LDPE 0.90 to 0.91 g/mL.Based on these densities,which plastic/s will sink in an ethanol/water mixture that has a density of 0.94 g/mL?

Accepted Answer

Both PET and HDPE have densities greater than 0.94 g/mL, so they will sink in the ethanol/water mixture.

Quiz 9: The World of Polymers and Plastics

Skin,hair,muscle,and enzymes are all made of protein,which is a natural polymer.Proteins are

This symbol is found on the bottom of a Coke bottle.What does the number mean?

Which raw material serves as the source for most polymers?

Proteins are polymers of amino acids held together by bonds.

Adipic acid,one of the monomers used to make nylon,has a total of six carbon atoms with two carboxylic acid functional groups.Which structure is correct?

This pie chart gives the composition by weight of municipal solid waste (MSW) before recycling in 2008. Which of the following statements is not true?

Every year about 100 billion pounds of plastic are produced in the United States (over 350 pounds for every woman,man,and child) .What strategies may be employed to reduce the amount of plastics going into landfills?

Incineration of plastics can be used to generate energy.One of the "big six" plastics releases hydrochloric acid,HCl,when incinerated.Which one?

Which atoms are present in all proteins?

This symbol is an example of the coding symbols found on packaging materials.These symbols let consumers know

What is biodegradation?

Nathaniel Wayeth,developer of the plastic soft drink bottles,dreamed of the day when we will be able to melt down plastic bottles,reinforce the fibers and make car bodies.Then when we are done with the cars,melt down the car bodies and make bottles out of them.This would be an ultimate example of

Which functional groups are present in all amino acids?

One of the monomers used to make nylon is 1,6-diaminohexane (also known as hexamethylene diamine) .How many amine ( - NH₂) groups does it have?

PET (polyethylene terephthalate) is classified as a polyester because

This is a representation of a plastic bag being stretched.Which statement best describes what is happening in the figure?

Nylon is classified as a polyamide because it contains which of the following linkages?

Will synthetic polymers always have to be made from crude oil?

When I and II react together to make nylon,what are the products of the first condensation reaction?

These are the densities of some common plastics: PET 1.38 to 1.39 g/mL;HDPE 0.95 to 0.97 g/mL;LDPE 0.90 to 0.91 g/mL.Based on these densities,which plastic/s will sink in an ethanol/water mixture that has a density of 0.94 g/mL?

Quiz 9: The World of Polymers and Plastics

Skin,hair,muscle,and enzymes are all made of protein,which is a natural polymer.Proteins are

This symbol is found on the bottom of a Coke bottle.What does the number mean?

Which raw material serves as the source for most polymers?

Proteins are polymers of amino acids held together by bonds.

Adipic acid,one of the monomers used to make nylon,has a total of six carbon atoms with two carboxylic acid functional groups.Which structure is correct?

This pie chart gives the composition by weight of municipal solid waste (MSW) before recycling in 2008. Which of the following statements is not true?

Every year about 100 billion pounds of plastic are produced in the United States (over 350 pounds for every woman,man,and child) .What strategies may be employed to reduce the amount of plastics going into landfills?

Incineration of plastics can be used to generate energy.One of the "big six" plastics releases hydrochloric acid,HCl,when incinerated.Which one?

Which atoms are present in all proteins?

This symbol is an example of the coding symbols found on packaging materials.These symbols let consumers know

What is biodegradation?

Nathaniel Wayeth,developer of the plastic soft drink bottles,dreamed of the day when we will be able to melt down plastic bottles,reinforce the fibers and make car bodies.Then when we are done with the cars,melt down the car bodies and make bottles out of them.This would be an ultimate example of

Which functional groups are present in all amino acids?

One of the monomers used to make nylon is 1,6-diaminohexane (also known as hexamethylene diamine) .How many amine ( - NH2) groups does it have?

PET (polyethylene terephthalate) is classified as a polyester because

This is a representation of a plastic bag being stretched.Which statement best describes what is happening in the figure?

Nylon is classified as a polyamide because it contains which of the following linkages?

Will synthetic polymers always have to be made from crude oil?

When I and II react together to make nylon,what are the products of the first condensation reaction?

These are the densities of some common plastics: PET 1.38 to 1.39 g/mL;HDPE 0.95 to 0.97 g/mL;LDPE 0.90 to 0.91 g/mL.Based on these densities,which plastic/s will sink in an ethanol/water mixture that has a density of 0.94 g/mL?

One of the monomers used to make nylon is 1,6-diaminohexane (also known as hexamethylene diamine) .How many amine ( - NH₂) groups does it have?