Edexcel IGCSE Chemistry Chemistry Paper 1 November 2020 examiner report (4CH1/1C)
Examiner report
- Q1 - 7 marks - Electronic structure, Group 0: the noble gases, Group 1: the alkali metals, Ionic bonding and ionic compounds, Metals and non-metals, The periodic table
- Q2 - 6 marks - Pure substances, The three states of matter
- Q3 - 8 marks - Corrosion and its prevention, Oxidation and reduction in terms of electrons, Reactivity of metals
- Q4 - 10 marks - Amounts of substance in equations, Ionic bonding and ionic compounds, Relative formula mass, The pH scale and neutralisation
- Q5 - 12 marks - Conservation of mass and balanced equations, Covalent bonding, Diamond, graphite, graphene and fullerenes, Electronic structure, Free-radical substitution, Properties of small molecules
- Q6 - 14 marks - Addition polymerisation, Empirical formulae, Fractional distillation and petrochemicals, Isomerism, Organic chemistry
- Q7 - 14 marks - Collision theory and activation energy, Factors affecting the rate of reaction
- Q8 - 14 marks - Calorimetry, Enthalpy changes, Exothermic and endothermic reactions
- Q9 - 12 marks - Amounts of substance in equations, Conservation of mass and balanced equations, Percentage yield, Thermal decomposition
- Q10 - 13 marks - Conservation of mass and balanced equations, Empirical formulae, Making soluble salts, Tests for gases
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