Edexcel IGCSE Chemistry Chemistry Paper 2 June 2022 examiner report (4CH1/2CR)
Examiner report
- Q1 - 5 marks - Isotopes and relative atomic mass, Subatomic particles
- Q2 - 5 marks - Atoms, elements and compounds, Oxidation and reduction in terms of electrons, Relative formula mass, The three states of matter
- Q3 - 10 marks - Atmospheric pollutants, Conservation of mass and balanced equations, Crude oil, hydrocarbons and alkanes, Empirical formulae, Free-radical substitution, Moles and amount of substance, Organic chemistry, Properties of hydrocarbons
- Q4 - 11 marks - Electrolysis, Half equations at electrodes, Ionic bonding and ionic compounds, Properties of metals and alloys, Tests for gases
- Q5 - 12 marks - Conservation of mass and balanced equations, Empirical formulae, Esters, Organic chemistry, Producing ethanol
- Q6 - 12 marks - Concentration of solutions, Making soluble salts, Titrations
- Q7 - 15 marks - Catalysts, Reaction profiles, Reversible reactions, The effect of changing conditions on equilibrium, Volumes of gases
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