Summary

• Description:

  The PDF document comprises KALA Trial Chemistry Paper 2 2026 Mock Exam with Marking Scheme. The marking scheme is in a different document.

  It was a KCSE Chemistry Paper 2 (233/2) mock examination prepared for secondary school candidates.

  This paper tests analytical competencies across the periodic table, electrochemistry, chemical energetics, reaction rates and chemical equilibria, organic chemistry pathways, and the industrial extraction of iron.

  • Month Administered: June 2026
  • Duration: 2 Hours
  • Total Marks: 80 Marks
  • Number of Questions: 7 Questions (Questions 1 - 7)
  • Structure: Comprehensive structured theory examination consisting of seven compulsory structured questions

  It covers the following topics:

  • Question 1:
    • Periodic table trends: electronic configuration, atomic radius, and ionization energy
    • Radioactivity: half-life calculations, beta decay nuclear equations, and isotopic applications
  • Question 2:
    • Electrochemistry: electrolysis of aqueous copper(II) sulphate using inert and active electrodes
    • Standard electrode potentials: cell EMF calculations, electrochemical cell diagrams, and cell notation
  • Question 3:
    • Thermochemistry: molar enthalpy of combustion of butane, heat capacity calculations, and fuel selection
    • Hess's Law: energy cycle diagrams and enthalpy of formation calculations
  • Question 4:
    • Reaction rates: rate of evolution of carbon(IV) oxide, graphing mass loss, and surface area effects
    • Chemical equilibrium: Le Chatelier's principle applied to the chromate/dichromate equilibrium system
  • Question 5:
    • Organic chemistry: structural isomerism of halogenated hydrocarbons
    • Hydrocarbon analysis: distinguishing tests between alkanes and alkenes
    • Reaction pathways: oxidation of alcohols, esterification, catalytic dehydration, and polymerization
  • Question 6:
    • Inorganic reaction pathways: thermal decomposition of lead(II) nitrate and reactions of nitrogen oxides
    • Laboratory preparation and properties of nitrogen gas from ammonia and copper(II) oxide
    • Stoichiometric calculations based on reacting volumes of gases
  • Question 7:
    • Industrial extraction of metals: extraction of iron in the blast furnace
    • Raw materials: roles of haematite, coke, limestone, and hot air
    • Chemical reduction equations and temperature zones in the blast furnace
• File Size:

  519.01 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.