Edexcel IGCSE Chemistry Chemistry Paper 2 November 2021 examiner report (4CH1/2C)
Examiner report
- Q1 - 5 marks - Group 1: the alkali metals, Group 7: the halogens, Metals and non-metals, The periodic table
- Q2 - 11 marks - Solubility and solubility curves
- Q3 - 8 marks - Conservation of mass and balanced equations, Oxidation and reduction in terms of electrons, Relative formula mass, The three states of matter
- Q4 - 13 marks - Conservation of mass and balanced equations, Electrolysis, Half equations at electrodes, Ionic bonding and ionic compounds, The pH scale and neutralisation
- Q5 - 12 marks - Amounts of substance in equations, Extraction of metals and reduction, Metallic bonding, Properties of metals and alloys, Using electrolysis to extract metals
- Q6 - 11 marks - Alcohols, Carboxylic acids, Concentration of solutions, Condensation polymerisation, Esters, Producing ethanol, Volumes of gases
- Q7 - 10 marks - Bond energy calculations, Dynamic equilibrium, Reaction profiles, The effect of changing conditions on equilibrium
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