A-LevelChemistryPolymerisationOct/Nov 2018Paper 4 Q511 Marks
Polyhydroxyamide is a fire-resistant polyamide which is formed from the two monomers, F and G. [Structure of F: HO₂C-C₆H₄-CO₂H (benzene-1,4-dicarboxylic acid)] [Structure of G: H₂N-C₆H₄-OH (4-aminophenol)] Addition polymers can be classified into two types. • homopolymer - a polymer made up of the same monomer unit • copolymer - a polymer made up of two or more different monomer units The reaction of propene, CH3CH=CH2, with phenylethene, C6H5CH=CH2, gives a copolymer.
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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