Edexcel IGCSE Chemistry Chemistry Paper 2 January 2021 examiner report (4CH1/2CR)
Examiner report
- Q1 - 5 marks - The three states of matter
- Q2 - 9 marks - Group 7: the halogens, Ionic bonding and ionic compounds, Oxidation and reduction in terms of electrons
- Q3 - 13 marks - Electrolysis, Half equations at electrodes, Properties of metals and alloys
- Q4 - 7 marks - Alcohols, Carboxylic acids, Esters, Oxidation of alcohols
- Q5 - 13 marks - Bond energy calculations, Catalysts, Reaction profiles
- Q6 - 10 marks - Concentration of solutions, Conservation of mass and balanced equations, The pH scale and neutralisation, Titrations
- Q7 - 6 marks - Crude oil, hydrocarbons and alkanes, Moles and amount of substance, Organic chemistry, Volumes of gases
- Q8 - 7 marks - Conservation of mass and balanced equations, Dynamic equilibrium, Tests for gases, The effect of changing conditions on equilibrium
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