Chem 336 - Spring 1999 - Organic Chemistry III
Portland State University - Dr. Carl C. Wamser

---

Chapter 23 Pre-Quiz

(1 point each)

1. The polymer made from caprolactam is best described as a

a) polyester

b) polylactam

c) vinyl polymer

d) polyamide

e) polyurethane

2. The polymer most likely to have been made from a chain polymerization is

a) Kevlar

b) Lexan

c) Teflon

d) Plexiglass

e) cellulose

3. Benzoyl peroxide is often used as an initiator for

a) step-growth polymerization

b) radical polymerization

c) cationic polymerization

d) anionic polymerization

e) Ziegler-Natta polymerization

4. Which of the following is NOT a major difference between low-density and high-density polyethylene?

a) amount of branching

b) melting point

c) amount of crystallinity

d) transparency

e) C/H ratio

5. Which phrase best describes "living" polymerizations?

a) polymerizations conducted by bacteria genetically engineered to make polymers

b) polymerizations conducted in a manner such that chain-transfer and chain-termination steps are not significant

c) polymerizations conducted such that the ends of the polymer are formed initially and polymer growth occurs by insertion of monomers in the middle of the polymer

d) polymerizations conducted such that the resulting polymer is cyclic