Question 1

The glass transition temperature, Tg, is the temperature above which the polymer becomes brittle.

Accepted Answer

A) True 
 B)False

Question 2

Monomers

Accepted Answer

A)  are small building blocks of polymers. 
B)  are small polymers. 
C)  are ethylene. 
D)  cannot form polymers. 
A)  are small building blocks of polymers. 
B)  are small polymers. 
C)  are ethylene. 
D)  cannot form polymers.

Question 3

A large number of polymers are synthesized from monomers that are derived from ethylene. Replacing one or more of the hydrogen atoms on the ethylene monomer does not change the properties of the polymer.

Accepted Answer

A) True 
 B)False

Question 4

How does the monomer of polyvinyl chloride (PVC) differ from the monomer of polyethylene (PE)?

Accepted Answer

A)  The PVC monomer has a chlorine atom, but the PE monomer does not. 
B)  The PVC monomer has two chlorine atoms, but the PE monomer does not. 
C)  The PE monomer has one chlorine atom, and the PVC monomer has two chlorine atoms. 
D)  The PVC monomer has a triple bond, and the PE monomer has a double bond. 
A)  The PVC monomer has a chlorine atom, but the PE monomer does not. 
B)  The PVC monomer has two chlorine atoms, but the PE monomer does not. 
C)  The PE monomer has one chlorine atom, and the PVC monomer has two chlorine atoms. 
D)  The PVC monomer has a triple bond, and the PE monomer has a double bond.

Question 5

The segment of a polymer shown below represents a

Accepted Answer

A)  polyamide. 
B)  polyester. 
C)  polyethylene. 
D)  polystyrene. 
A)  polyamide. 
B)  polyester. 
C)  polyethylene. 
D)  polystyrene.

Question 6

What are composite materials? What are their advantages? Give two examples of products that use composite materials.

Accepted Answer

Composite materials, also known as compo

Question 7

Amorphous polymers tend to have great strength and rigidity while crystalline polymers tend to have greater elasticity.

Accepted Answer

A) True 
 B)False

Question 8

Thermosetting polymers can be melted and reformed into different shapes.

Accepted Answer

A) True 
 B)False

Question 9

In order for a synthetic polymer to be used as a binder in water-base latex paints, it must have ________ properties.

Accepted Answer

A)  reactive 
B)  inert 
C)  rubberlike 
D)  aromatic 
A)  reactive 
B)  inert 
C)  rubberlike 
D)  aromatic

Question 10

Which of the following types of carbon consists of one-atom-thick planar sheets of carbons?

Accepted Answer

A)  buckyballs 
B)  graphene 
C)  graphite 
D)  nanotubes 
A)  buckyballs 
B)  graphene 
C)  graphite 
D)  nanotubes

Question 11

Which of the following statements about crystalline and amorphous polymers is correct?

Accepted Answer

A)  Crystalline polymers tend to be stronger, while amorphous polymers tend to have great elasticity. 
B)  Crystalline polymers tend to have greater elasticity, while amorphous polymers tend to be stronger. 
C)  Both crystalline and amorphous polymers are strong but have little elasticity. 
D)  Both crystalline and amorphous polymers have great elasticity but have little strength. 
A)  Crystalline polymers tend to be stronger, while amorphous polymers tend to have great elasticity. 
B)  Crystalline polymers tend to have greater elasticity, while amorphous polymers tend to be stronger. 
C)  Both crystalline and amorphous polymers are strong but have little elasticity. 
D)  Both crystalline and amorphous polymers have great elasticity but have little strength.

Question 12

Polyvinyl chloride is used for drain pipes in plumbing applications. It has replaced traditional cast iron pipe for this purpose. The major advantage of PVC in replacing cast iron for this application (particularly if you are a plumber or homeowner) is that PVC

Accepted Answer

A)  is of lighter weight. 
B)  is easier to handle and cut. 
C)  is more resistant to corrosion. 
D)  All of the above are advantages of PVC. 
A)  is of lighter weight. 
B)  is easier to handle and cut. 
C)  is more resistant to corrosion. 
D)  All of the above are advantages of PVC.

Question 13

Nylons are named according to the number of ________ atoms in each monomer unit.

Accepted Answer

A)  hydrogen 
B)  nitrogen 
C)  oxygen 
D)  carbon 
A)  hydrogen 
B)  nitrogen 
C)  oxygen 
D)  carbon

Question 14

A copolymer is composed of

Accepted Answer

A)  two or more different monomers. 
B)  different polymers linked end to end. 
C)  different polymers cross-linked. 
D)  none of the above 
A)  two or more different monomers. 
B)  different polymers linked end to end. 
C)  different polymers cross-linked. 
D)  none of the above

Question 15

HDPE finds applications in

Accepted Answer

A)  waxed paper. 
B)  threaded bottle caps. 
C)  baggies. 
D)  cans. 
A)  waxed paper. 
B)  threaded bottle caps. 
C)  baggies. 
D)  cans.

Question 16

Which statement relating monomers and polymers is correct?

Accepted Answer

A)  They have the same chemical and physical properties. 
B)  They have different chemical and physical properties. 
C)  The monomer is usually a solid, while the polymer is usually a liquid or gas. 
D)  They have the same chemical formula. 
A)  They have the same chemical and physical properties. 
B)  They have different chemical and physical properties. 
C)  The monomer is usually a solid, while the polymer is usually a liquid or gas. 
D)  They have the same chemical formula.

Question 17

What type of polymer is used for silly putty?

Accepted Answer

The answer of What type of polymer is used for...

Question 18

Polychlorinated biphenyls (PCBs) have been banned because they are an environmental hazard. Which of the following was NOT a reason for banning them?

Accepted Answer

A)  PCBs degrade slowly in nature. 
B)  PCBs are nonpolar compounds and do not dissolve readily in water. 
C)  PCBs have high electrical resistance and are excellent insulating materials. 
D)  They lower the glass transition temperature, Tg, when they are added to a polymer. 
A)  PCBs degrade slowly in nature. 
B)  PCBs are nonpolar compounds and do not dissolve readily in water. 
C)  PCBs have high electrical resistance and are excellent insulating materials. 
D)  They lower the glass transition temperature, Tg, when they are added to a polymer.

Question 19

Natural rubber can be made from the monomer

Accepted Answer

A)  propylene. 
B)  polybutylene. 
C)  polyvinyl acetate. 
D)  isoprene. 
A)  propylene. 
B)  polybutylene. 
C)  polyvinyl acetate. 
D)  isoprene.

Question 20

The greatest hazard in using plastics in home building materials and furnishings is that some

Accepted Answer

A)  poison children who eat them. 
B)  cause cancer. 
C)  are slippery. 
D)  form poisonous gases when burned. 
A)  poison children who eat them. 
B)  cause cancer. 
C)  are slippery. 
D)  form poisonous gases when burned.

Exam 10: Polymers

The glass transition temperature, Tg, is the temperature above which the polymer becomes brittle.

Monomers

A large number of polymers are synthesized from monomers that are derived from ethylene. Replacing one or more of the hydrogen atoms on the ethylene monomer does not change the properties of the polymer.

How does the monomer of polyvinyl chloride (PVC) differ from the monomer of polyethylene (PE)?

The segment of a polymer shown below represents a

What are composite materials? What are their advantages? Give two examples of products that use composite materials.

Amorphous polymers tend to have great strength and rigidity while crystalline polymers tend to have greater elasticity.

Thermosetting polymers can be melted and reformed into different shapes.

In order for a synthetic polymer to be used as a binder in water-base latex paints, it must have ________ properties.

Which of the following types of carbon consists of one-atom-thick planar sheets of carbons?

Which of the following statements about crystalline and amorphous polymers is correct?

Polyvinyl chloride is used for drain pipes in plumbing applications. It has replaced traditional cast iron pipe for this purpose. The major advantage of PVC in replacing cast iron for this application (particularly if you are a plumber or homeowner) is that PVC

Nylons are named according to the number of ________ atoms in each monomer unit.

A copolymer is composed of

HDPE finds applications in

Which statement relating monomers and polymers is correct?

What type of polymer is used for silly putty?

Polychlorinated biphenyls (PCBs) have been banned because they are an environmental hazard. Which of the following was NOT a reason for banning them?

Natural rubber can be made from the monomer

The greatest hazard in using plastics in home building materials and furnishings is that some

Chemistry

Atoms

Atomic Structure

Chemical Bonds

Chemical Accounting

Gases, Liquids, Solids, and Intermolecular Forces

Acids and Bases

Oxidation and Reduction

Organic Chemistry

Nuclear Chemistry

Chemistry of the Earth

Air

Water

Energy

Biochemistry

Food

Drugs

Fitness and Health

Chemistry Down on the Farm

Household Chemicals

Poisons

Filters

The glass transition temperature, T_g, is the temperature above which the polymer becomes brittle.