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.

2001

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.