Chemistry WCH15/01 January 2021 | Edexcel International A Level Past Papers With Mark Scheme

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1. transition metal chemistry—oxidation state changes, ligand bonding, complex shapes, catalytic redox cycling (Fe²⁺/Fe³⁺), disproportionation, colour origin in d-block ions

2. electrochemistry—standard electrode potential use, cell diagram construction, E°cell calculation, thermodynamic feasibility, fuel cell half-equations

3. organic chemistry—mass spectrum fragment identification, synthetic route design (ketone to alcohol/alkene), NMR interpretation, isomer prediction, Grignard-like transformations

4. spectroscopy and polymer chemistry—monomer structure deduction from repeat units, polymer classification (polypeptide vs polyamide), ¹³C NMR peak counting

5. aromatic and amine chemistry—benzene reactivity vs alkene, phenylamine basicity comparison, electrophilic substitution, pH trend among amines

6. applied chemistry and biochemistry—caffeine structure-bonding relationship, basicity vs primary amines, antioxidant and bioactive compound analysis in coffee, synthesis of chlorogenic acid from quinic and caffeic acids, proton NMR interpretation of food-derived molecules

Edexcel International AS/A Level Chemistry (WCH) Jan 2021

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Classification: Unit 5

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Chemistry WCH15/01 January 2021 | Edexcel International A Level Past Papers With Mark Scheme

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