Question
In 2023, the European Chemical Agency proposed a blanket ban on more than 10,000 fluoropolymers that can degrade into these chemicals. For 10 points each:
[10e] Give this general term for chemicals that cause cancer.
ANSWER: carcinogens [or carcinogenic compounds]
[10m] The ban would include this simple polymer, a chain of carbon atoms completely saturated by fluorine. You may give either its real name or its brand name, an inert coating sold by DuPont.
ANSWER: PTFE [or polytetrafluoroethylene; or Teflon]
[10h] Also on the chopping block is PVDF, a polymer used in industrial pressure and voltage sensors because it has this physical property. A scanning probe microscope’s tip is controlled with nanometer precision by a ceramic tube scanner with this property.
ANSWER: piezoelectricity [accept ferroelectricity or pyroelectricity]
<Adam Silverman, Science - Chemistry> ~22941~ <Editor: Adam Silverman>
Data
Summary
| Tournament | Edition | Exact Match? | Heard | PPB | Easy % | Medium % | Hard % |
|---|---|---|---|---|---|---|---|
| 2024 PACE NSC | 06/08/2024 | Y | 36 | 19.17 | 100% | 64% | 28% |