Leaving Cert Chemistry 2025

The 2025 Leaving Cert Chemistry exam paper and official marking scheme, free below as direct PDF links from the State Examinations Commission archive.

Higher Level

Exam PaperMarking Scheme
What's in the 2025 Higher Level paper?
  • Q1 volumetric analysis, redox titration, iron determination, experimental · 50 marks
  • Q2 organic chemistry, extraction, steam distillation, experimental · 50 marks
  • Q3 rates of reaction, catalysis, experimental, graphing · 50 marks
  • Q4 short questions, general chemistry · 50 marks
  • Q5 atomic structure, isotopes, atomic orbitals, periodicity · 50 marks
  • Q6 fuels, fractional distillation, thermochemistry, hydrocarbons · 50 marks
  • Q7 acids and bases, ph, indicators, equilibria · 50 marks
  • Q8 organic chemistry, reaction schemes, esterification, bonding · 50 marks
  • Q9 chemical equilibrium, kc, le chateliers principle · 50 marks
  • Q10 bonding, shapes of molecules, organic addition reactions, stoichiometry · 50 marks
  • Q11 water analysis, thermochemistry, radioactivity, nitrogen cycle, electrolysis · 50 marks

Ordinary Level

Exam PaperMarking Scheme
What's in the 2025 Ordinary Level paper?
  • Q1 soap-making, saponification, reflux, distillation · 50 marks
  • Q2 volumetric analysis, titration, standard solution, acid-base · 50 marks
  • Q3 rates of reaction, graphing, collision theory, experimental technique · 50 marks
  • Q4 short questions, general knowledge, periodic trends, organic chemistry · 50 marks
  • Q5 atomic theory, atomic structure, isotopes, electron configuration · 50 marks
  • Q6 hydrocarbons, alkanes, alkenes, combustion · 50 marks
  • Q7 acids and bases, ph, alkali metals, balancing equations · 50 marks
  • Q8 organic chemistry, ethene, polymers, addition reactions · 50 marks
  • Q9 redox, electrochemical series, displacement reactions, electrolysis · 50 marks
  • Q10 sewage treatment, states of matter, mole calculations, stoichiometry · 50 marks
  • Q11 periodic table, bonding, equilibrium, carbon cycle · 50 marks

Revise Chemistry by topic

Atomic Theory & the Periodic TableChemical Bonding & Molecular ShapeOxidation–Reduction & ElectrochemistryStoichiometry, the Mole, Formulas & EquationsVolumetric Analysis (Titrations)Acids, Bases & pHRates of ReactionChemical EquilibriumThermochemistry (Energetics)Organic Chemistry, Hydrocarbons & FuelsWater, Environmental & Atmospheric ChemistryIndustrial ChemistryLaboratory Skills & Techniques
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Questions come from the official State Examinations Commission papers. Every link opens the original PDF on examinations.ie.