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Chemistry · Edexcel 4CH1 · Chemistry Paper 1 · regional · January 2023

Edexcel IGCSE Chemistry Chemistry Paper 1 January 2023 examiner report (4CH1/1CR)

2h 110 marks

Examiner report

  1. Q1 - 5 marks - The three states of matter
  2. Q2 - 7 marks - Corrosion and its prevention, Greenhouse gases and climate change, The composition and evolution of the atmosphere
  3. Q3 - 15 marks - Atmospheric pollutants, Conservation of mass and balanced equations, Crude oil, hydrocarbons and alkanes, Free-radical substitution, Isomerism, Organic chemistry
  4. Q4 - 13 marks - Collision theory and activation energy, Factors affecting the rate of reaction
  5. Q5 - 12 marks - Covalent bonding, Crude oil, hydrocarbons and alkanes, Empirical formulae, Relative formula mass
  6. Q6 - 11 marks - Group 7: the halogens, Isotopes and relative atomic mass, Tests for gases
  7. Q7 - 10 marks - Conservation of mass and balanced equations, Empirical formulae, Exothermic and endothermic reactions, Oxidation and reduction in terms of electrons, Reactivity of metals
  8. Q8 - 12 marks - Amounts of substance in equations, Giant covalent structures, Properties of small molecules, Tests for gases, Thermal decomposition
  9. Q9 - 10 marks - Conservation of mass and balanced equations, Making soluble salts
  10. Q10 - 15 marks - Calorimetry, Enthalpy changes, Exothermic and endothermic reactions, Identification of ions