10-minute Quiz : Chapter 57 Synthetic polymers and plastics

Which of the following statements concerning the monomers used in addition polymerization is correct?

• A. The monomers are usually saturated compounds.
• B. The monomers are usually unsaturated compounds.
• C. The monomers are usually cyclic unsaturated compounds.
• D. The monomers are usually bifunctional saturated compounds.

Which of the following is/are the properties of polytetrafluoroethene?

(1) It has a high melting point.

(2) It is hard but brittle.

(3) It is easily attacked by strong acids and alkalis.　

• A. (1) only
• B. (2) only
• C. (1) and (3) only
• D. (2) and (3) only

Which of the substances is the active ingredient of superglue?

• A
• B
• C
• D

Which of the polymers uses ethane-1,2-diol as a monomer?

• A
• B
• C
• D

In which of the following polymers are its repeating units joined together by ester linkages?

(1) PMMA

(2) PLA

(3) PHB　

• A. (1) and (2) only
• B. (1) and (3) only
• C. (2) and (3) only
• D. (1), (2) and (3)

Which of the following polymers is NOT a polyamide?

• A. Kevlar
• B. Nylon
• C. Urea-methanal
• D. Vulcanized rubber

Which of the following polymers have cross-linked structures?

(1) Kevlar

(2) Urea-methanal

(3) Vulcanized rubber　

• A. (1) and (2) only
• B. (1) and (3) only
• C. (2) and (3) only
• D. (1), (2) and (3)

Which of the combinations concerning the thermal properties, uses and fabrication methods of the polymers is INCORRECT?

• A
• B
• C
• D

Direction: Questions 9 and 10 are about natural rubber.

A part of the structure of a polymer chain of natural polymer is shown in the diagram. Which of the options is the repeating unit of natural rubber?

• A
• B
• C
• D

Direction: Questions 9 and 10 are about natural rubber.

Some of the physical properties of natural rubber can be improved by vulcanization. What are these properties?

(1) Tensile strength

(2) Hardness

(3) Elasticity　

• A. (1) and (2) only
• B. (1) and (3) only
• C. (2) and (3) only
• D. (1), (2) and (3)