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Chemistry · Edexcel 4CH1 · Chemistry Paper 1 · regional · January 2021

Edexcel IGCSE Chemistry Chemistry Paper 1 January 2021 examiner report (4CH1/1CR)

2h 110 marks

Examiner report

  1. Q1 - 6 marks - Atoms, elements and compounds, Metals and non-metals, The periodic table
  2. Q2 - 7 marks - Chromatography
  3. Q3 - 13 marks - Atmospheric pollutants, Conservation of mass and balanced equations, Cracking and alkenes, Crude oil, hydrocarbons and alkanes, Fractional distillation and petrochemicals
  4. Q4 - 9 marks - Corrosion and its prevention, The composition and evolution of the atmosphere
  5. Q5 - 12 marks - Conservation of mass and balanced equations, Reactivity of metals, Tests for gases, Thermal decomposition
  6. Q6 - 12 marks - Collision theory and activation energy, Conservation of mass and balanced equations, Factors affecting the rate of reaction, Tests for gases
  7. Q7 - 8 marks - Covalent bonding, Ionic bonding and ionic compounds, Properties of ionic compounds, Properties of small molecules
  8. Q8 - 15 marks - Addition polymerisation, Alkenes, Amounts of substance in equations, Greenhouse gases and climate change, Isomerism, Organic chemistry
  9. Q9 - 13 marks - Calorimetry, Conservation of mass and balanced equations, Enthalpy changes, Group 1: the alkali metals
  10. Q10 - 15 marks - Empirical formulae, Identification of ions, Making soluble salts, Percentage yield