Summary

• Description:

  The MS Word document comprises AIC CHAMPION JOINT Chemistry Paper 1 2026 Mock Exam with Answers (Marking Scheme). The PDF version is also available upon your request. The marking scheme is in a different document.

  It was a KCSE Chemistry 233/1 examination.

  This core theory examination comprehensively covers chemical principles across atomic structure, stoichiometric calculations, periodicity, organic reaction pathways, electrochemistry, and environmental chemistry.

  • Month Administered: July/August 2026
  • Duration: 2 Hours
  • Total Marks: 80
  • Number of Questions: 27 (Questions 1–27)
  • Structure: 27 compulsory structured short-answer questions covering Forms 1 to 4 work.

  It covers the following topics:

  • Atomic structure: subatomic particles, atomic neutrality, and isotopic abundance calculations
  • Gas chemistry: thermal decomposition of lead(II) nitrate and gas confirmation tests
  • Acids, bases, and indicators: classification of common household substances and commercial indicators
  • Combustion and flames: reactions occurring in charcoal burners (jiko regions)
  • Salts: laboratory preparation of barium sulphate via precipitation
  • Industrial chemistry: large-scale synthesis of hydrochloric acid and absorption towers
  • Stoichiometry: single atom mass calculations, Gay-Lussac's law, and reacting gas volumes
  • Separation of mixtures: separating sodium chloride and lead(II) chloride based on solubility
  • Periodic trends: electronic configuration of ions, atomic radius trends, and halogen properties
  • Electrochemistry: electrolysis of dilute magnesium sulphate and Faraday's law calculations
  • Corrosion: conditions for iron rusting, rust formation equations, and prevention methods
  • Laboratory preparation of gases: ammonia preparation and inverted funnel dissolution
  • Polymer chemistry: condensation structures of Nylon and Terylene/Polyester and their properties
  • Water quality: identification and chemical treatment of temporary and permanent hardness
  • Physical chemistry: definitions of first ionization energy and specific heat capacity
  • Combustion of hydrogen: condensing water droplets and measuring products of combustion
  • Gas laws: Boyle's law graphical plots and Graham's law of diffusion calculations
  • Chemical bonding: comparison of covalent and ionic bonds and intermolecular forces in water vs. methane
  • Solubility: salt solubility curves and mass of solute remaining undissolved
  • Thermochemistry: fuel heating values, enthalpy level diagrams, activation energy, and Hess's law cycles
  • Organic chemistry: catalytic dehydration of ethanol to ethene and IUPAC nomenclature of haloalkanes
  • Sulphur chemistry: redox reaction between hydrogen sulphide and sulphur(IV) oxide
  • Chemical equilibrium: dynamic equilibrium and Le Chatelier’s principle in chromate-dichromate systems
  • Industrial metallurgy: extraction of sodium metal via the Down's cell process
• File Size:

  719.97 KB
• Length:

  12 pages
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  Chemistry
• Posted By:

  Caleb_Peter

Enter your details below to initiate a payment using MPESA.