MCQOPTIONS
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| 1. |
Which of the following polymers does not produce a smoky flame? |
| A. | polybutadiene rubber |
| B. | gutta percha |
| C. | poly (vinyl acetate) |
| D. | polysulphide rubber |
| E. | polysulphide rubber |
| Answer» E. polysulphide rubber | |