Two reactions, R and S, each make one polymer chain. Each reaction is either addition polymerisation or condensation polymerisation.
The table shows the total numbers of atoms in all the monomer molecules before the reaction and in the polymer chain after the reaction. Any atoms not present in the polymer are in one other product.
| Reaction | Substance | Carbon atoms | Hydrogen atoms | Oxygen atoms |
|---|---|---|---|---|
| R | Monomers | 80 | 160 | 0 |
| R | Polymer | 80 | 160 | 0 |
| S | Monomers | 50 | 102 | 38 |
| S | Polymer | 50 | 78 | 26 |
Explain which reaction is addition polymerisation and which reaction is condensation polymerisation. Use the data in the table.
Name the other product formed in Reaction S.
Calculate the number of molecules of the other product formed in Reaction S.
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.