MCQOPTIONS
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| 1. |
Plexiglass (also called lucite) because of its high optical transparency is used for making lenses. It is chemically |
| A. | polymethyl methacrylate (PMMA). |
| B. | Polytetraflouroethylene(PTFE). |
| C. | polycarbonates. |
| D. | phenolic resins. |
| Answer» B. Polytetraflouroethylene(PTFE). | |