GRE Reading Comprehension
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Source: XDF
For acrylic, a clear rigid plastic, to be cast, fairly complex molecules must be induced to link up, in a process called polymerization. Polymerization is exothermic, i.e., its net effect is that each time molecules link, a small quantity of heat is generated. In addition, the rate of linking speeds up as temperature increases.
Question List: 1
Which of the following can be inferred from the passage above?
- A the method used to trigger the process of polymerization is a sharp increase in the temperature of the surrounding air.
- B unless the heat that results from the linking of molecules is drawn off promptly, there will be a heat buildup at an accelerating rate as acrylic is cast.
- C in the casting of thin sheets of acrylic, which lose heat quickly to the surrounding air, polymerization proceeds much faster than it does in the casting of thick pieces.
- D if air temperatures are kept steady when acrylic is cast, the rate at which the molecules link remains constant.
- E once the process of polymerization has been induced; it cannot be slowed before all possible links among molecules have been formed.