Edexcel IGCSE Chemistry Chemistry Paper 1 January 2020 examiner report (4CH1/1C)
Examiner report
- Q1 - 6 marks - Atmospheric pollutants, Conservation of mass and balanced equations, Greenhouse gases and climate change, Group 0: the noble gases, Oxidation and reduction in terms of electrons, The composition and evolution of the atmosphere, Thermal decomposition
- Q2 - 8 marks - Electronic structure, Isotopes and relative atomic mass, Subatomic particles
- Q3 - 10 marks - Corrosion and its prevention, Exothermic and endothermic reactions, Oxidation and reduction in terms of electrons, Reactivity of metals
- Q4 - 9 marks - Electronic structure, Ionic bonding and ionic compounds
- Q5 - 14 marks - Addition polymerisation, Alkenes, Crude oil, hydrocarbons and alkanes, Empirical formulae, Isomerism, Organic chemistry
- Q6 - 12 marks - Calorimetry, Conservation of mass and balanced equations, Exothermic and endothermic reactions, Reactivity of metals
- Q7 - 13 marks - Conservation of mass and balanced equations, Group 7: the halogens, Identification of ions
- Q8 - 11 marks - Diamond, graphite, graphene and fullerenes, Properties of small molecules, Tests for gases, The three states of matter
- Q9 - 15 marks - Atmospheric pollutants, Calorimetry, Enthalpy changes, Properties of hydrocarbons
- Q10 - 12 marks - Amounts of substance in equations, Catalysts, Conservation of mass and balanced equations, Percentage yield, Reversible reactions
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