Edexcel IGCSE Chemistry Chemistry Paper 1 November 2020 examiner report (4CH1/1CR)
Examiner report
- Q1 - 6 marks - Mixtures and separation techniques, Solubility and solubility curves
- Q2 - 5 marks - Electronic structure, Group 7: the halogens, Metals and non-metals, The periodic table
- Q3 - 14 marks - Alkenes, Conservation of mass and balanced equations, Crude oil, hydrocarbons and alkanes, Free-radical substitution, Isomerism, Organic chemistry
- Q4 - 14 marks - Catalysts, Collision theory and activation energy, Conservation of mass and balanced equations, Factors affecting the rate of reaction, Tests for gases
- Q5 - 11 marks - Atoms, elements and compounds, Covalent bonding, Crude oil, hydrocarbons and alkanes, Empirical formulae
- Q6 - 13 marks - Group 7: the halogens, Identification of ions, Tests for gases, The periodic table
- Q7 - 13 marks - Conservation of mass and balanced equations, Making soluble salts, Mixtures and separation techniques, Moles and amount of substance, Percentage yield, Reactivity of metals, Relative formula mass
- Q8 - 10 marks - Conservation of mass and balanced equations, Empirical formulae, Exothermic and endothermic reactions, Oxidation and reduction in terms of electrons, Reactivity of metals
- Q9 - 11 marks - Giant covalent structures, Properties of small molecules, The pH scale and neutralisation, The three states of matter, Thermal decomposition
- Q10 - 13 marks - Calorimetry, Conservation of mass and balanced equations, Enthalpy changes
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