A molecular modelling program compares an alkene, X, with three proposed repeating units for its polymer.
| Molecule or proposed repeating unit | Number of carbon atoms | Number of hydrogen atoms | Bond between the two reacting carbon atoms |
|---|---|---|---|
| X | 4 | 8 | double |
| R | 4 | 8 | single |
| S | 4 | 8 | double |
| T | 4 | 6 | single |
Explain which proposed repeating unit is consistent with addition polymerisation. Your answer should also explain whether a molecule other than the polymer would be produced.
94 exam-style questions on AQA GCSE Chemistry 7.3 Synthetic and naturally occurring polymers, covering 7.3.1 Addition polymerisation, 7.3.2 Condensation polymerisation, 7.3.3 Amino acids, and 7.3.4 DNA (deoxyribonucleic acid) and other naturally occurring polymers. Each one has a worked solution and a mark scheme showing where the marks go.