Edexcel IGCSE Chemistry Chemistry Paper 2 November 2020 examiner report (4CH1/2CR)
Examiner report
- Q1 - 5 marks
- Q2 - 7 marks - Electronic structure, Ionic bonding and ionic compounds, Isotopes and relative atomic mass, Subatomic particles
- Q3 - 8 marks - Cracking and alkenes, Fractional distillation and petrochemicals, Properties of hydrocarbons
- Q4 - 11 marks - Conservation of mass and balanced equations, Group 1: the alkali metals, Identification of ions, Ionic bonding and ionic compounds
- Q5 - 10 marks - Extraction of metals and reduction, Half equations at electrodes, Metallic bonding, Oxidation and reduction in terms of electrons, Properties of metals and alloys, Using electrolysis to extract metals
- Q6 - 13 marks - Concentration of solutions, Making soluble salts, The pH scale and neutralisation, Titrations
- Q7 - 16 marks - Amounts of substance in equations, Bond energy calculations, Carboxylic acids, Dynamic equilibrium, Enthalpy changes, Esters, Oxidation of alcohols, Volumes of gases
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