A cellulose is an example of a(n)
a. Fat
b. Isomer
c. Monomer
d. Polymer

D

Which is not a polymer?
a. Celluloid
b. Glucose
c. Silk
d. Wool

B

The first semisynthetic polymer was made from a natural polymer. It was
a. Bakelite, based on bacon grease
b. Celluloid, based on cellulose from cotton
c. Polypropylene, based on isopropyl alcohol
d. Polypantene, based on human hair

B

The first truly synthetic polymer was
a. Bakelite, made from phenol and formaldehyde
b. Cellulose, made from glucose
c. Polyethylene, made from ethanol
d. Rubber, made from isoprene

A

Natural rubber is a polymer of
a. Butadiene
b. Isobutylene
c. Isoprene
d. Propylene

C

A cross-linking agent is a(n)
a. Atom or group that bonds polymer chains together
b. Functional group on a polymer chain
c. Repeating unit in a polymer chain
d. Substituent group on a polymer chain

A

Charles Goodyear discovered that natural rubber could be cross-linked
by heating it with
a. A binder
b. Carbon
c. Isoprene
d. Sulfur

D

Styrene-butadiene rubber is an example of a
a. Copolymer
b. Natural elastomer
c. Natural cross-linked polymer
d. Polyamide

A

Polymers, usually elastomers, are used in paints as the
a. Binder
b. Initiator
c. Pigment
d. Solvent

A

In general, the worst way to dispose of plastics is
a. Composting
b. Incineration
c. In landfills
d. Recycling

B

Many plastics are fire hazards because they burn and produce
a. CFCs
b. Nitrogen oxides
c. Solid wastes
d. Toxic gases

D

Once used as a plasticizer, polychlorinated biphenyls (PCBs) were
discontinued because of
a. Their costs
b. The nonsustainable petroleum source
c. The environmental effect similar to DDT
d. The biodegradability of the products

C

Many flame-retardant fabrics incorporate
a. Br and Cl atoms
b. CFCs
c. PCBs
d. Phthalate plasticizers

A

Most synthetic polymers are made from
a. Coal
b. Cotton
c. Petroleum and natural gas
d. Sustainable sources

C

A polymer made from a renewable resource is
a. LDPE
b. Polyacrylonitrile
c. Polylactic acid
d. Styrene-butadiene rubber

D

Crystalline polymers are
a. Elastic
b. Flexible
c. Highly cross-linked
d. Used in fibers

D

Thermosetting polymers
a. Are easily recycled
b. Are always addition polymers
c. Cannot be melted and remolded
d. Usually melt at a lower temperature than do thermoplastic polymers

C

Each building-block molecule that joins to form a polymer is called a
a. Cross-link
b. Monomer
c. Polymer
d. Polypeptide

B

Compared to HDPE, LDPE has a lower melting point because it
a. Is made from fewer polar monomers
b. Is composed of molecules with a much lower molecular mass
c. Has fewer cross-links
d. Has more branches in its molecules, preventing them from packing closely

D

Which of the following is made of polyethylene?
a. Pre-1900 electrical wire insulation
b. Foamed coffee cups
c. Plastic grocery bags
d. Plastic plumbing pips

C

A copolymer is made
a. By blending two simple polymers
b. From cobalt and an alkene
c. From two identical monomers
d. From two different monomers

D

A polymer that cannot be melted and reshaped is said to be
a. Highly crystalline
b. Rubbery
c. Thermoplastic
d. Thermosetting

D

A buckyball is a
a. Large carbon molecule (C60)
b. Carbon nanotube wound up like a ball of string
c. Long polymer molecule wound up like a ball of string
d. Circular ring of carbon atoms

A

When addition polymers form, the monomer units are joined by
a. Delocalized electrons that flow along the polymer chain
b. Dispersion forces
c. Double bonds
d. New bonds formed by electrons from the double bonds in the monomers

D

Water pipes, bottles, and raincoats are commonly made from
a. Polyethylene
b. Polypropylene
c. Polytetrafluoroethylene
d. Polyvinyl chloride

D