A-level Chemistry/OCR (Salters)/Open-Book Paper

How to create diagrams
Diagrams are invaluable for conveying precise chemical information without encroaching on the word count. For two-dimensional diagrams such as skeletal formulae or flow charts, a molecule editor is your best bet.

For images of three-dimensional molecules, use molecular graphics software, such as Accelrys DS Visualizer, a free downloadable application for Windows. A tutorial on how to use DS Visualizer is available here.

Article 1: From Accident to Design: the progress of poly(ethene)

 * Discovery of poly(ethene)
 * Development of industrial production of poly(ethene)
 * Discovery of Ziegler-Natta catalysts

Article 2: Shaping up: the story of poly(propene)

 * /Stereochemistry in poly(propene)/
 * Development of Ziegler-Natta catalysts
 * /Discovery and development of metallocene catalysts/

Exemplar response
An exemplar response to the 2001 open paper exam is available here.