CHEM 219 EXAM PREP TEST BANK VERIFIED QUESTIONS AND CORRECT ANSWERS

CHEM 219 EXAM PREP TEST BANK
VERIFIED QUESTIONS AND CORRECT
ANSWERS

●● Macromolecule
Answer: very large molecule composed of thousands of covalently
bonded atoms (ex: polymer)


●● 1. natural (in nature)
2. synthetic (in lab)
Answer: two ways polymers are made


●● rubber, carbs: starch & cellulose, proteins, nucleic acids DNA, RNA
Answer: natural polymers


●● nylon, teflon, styrofoam, polyethylene, Dacron,
Answer: synthetic polymers


●● 1. method of formation
2. final composition
3. stereochemical orientation
Answer: 3 main ways to differentiate polymers

,●● 1. chain-growth
2. step-growth
Answer: Two classifications of Synthetic polymers


●● addition polymers
Answer: chain growth polymers are also know as:


●● made by addition of one monomer unit to another in a repetitive
pattern
Answer: How are chain growth polymers made?


●● chain growth polymerization
Answer: A polymerization involving sequential addition to monomers
that are unsaturated (C=C) or have some other reactive functional groups
(particularly ethylene and derivatives)


●● 1. intervention
2. consumption of all available monomers
Answer: what 2 things stops chain growth polymerization?


●● Teflon
Answer: chain-growth

, polymer: polytetrafluoroethylene
monomer: F2C=CF2
nonstick coating, goretex, electrical insulator, chem-resistant coating


●● Saran
Answer: chain-growth
polymer: polyvinylidenedichloride
monomer: H2C=CCl2
cling-wrap


●● Polypropylene
Answer: chain-growth
polymer: polypropylene
monomer: H2C=CHCH3
carpet fibers, car parts, toys, packaging, houseware


●● Orlon, Acrilan, Creslan
Answer: chain-growth
polymer: polyacrylonitrile
monomer: H2C=CH(CN)
textiles/fibers, carpets, upholstery