Summary

• Description:

  The MS Word document comprises Mmalina Trial 2 Chemistry Paper 2 2026 Mock Exam with Marking Scheme. The PDF version is also available upon your request. The marking scheme is in a different document.

  It was a KCSE Chemistry 233/2 examination.

  This theory examination thoroughly evaluates candidates' mastery of comprehensive chemistry topics including chemical families, industrial extraction of metals, electrochemistry, and organic reaction mechanisms. It provides authentic KCSE practice through extensive multi-part essay and data interpretation questions.

  • Month Administered: July 2026
  • Duration: 2 Hours
  • Total Marks: 80
  • Number of Questions: 7 (Questions 1 - 7)
  • Structure: Seven compulsory structured essay questions.

  It covers the following topics:

  • Question 1: The Periodic Table and Atomic Structure
    • Electronic configuration and periodic trends across periods and groups
    • Ion formation, atomic and ionic radii comparisons, and nature of oxides
  • Question 2: Electrochemistry
    • Electrolysis of zinc sulphate with platinum electrodes and copper(II) sulphate with copper electrodes
    • Electrochemical cells, standard electrode potentials, and cell EMF calculations
  • Question 3: Organic Chemistry
    • Esterification, carboxylic acids, and alcohol reactions
    • Saponification and cleaning action of soaps
    • Alkenes, cracking of alkanes, addition reactions, and synthetic polymers
  • Question 4: Sulphur and Its Compounds
    • Allotropes of sulphur and bleaching mechanisms of sulphur(IV) oxide vs chlorine
    • The Contact process for sulphuric(VI) acid manufacture and properties of hydrogen sulphide
  • Question 5: Extraction of Metals (Iron)
    • Identification of iron ores and chemical reactions across blast furnace zones
    • Role of limestone, coke, and slag separation from pig iron
  • Question 6: Thermochemistry and Energy Changes
    • Experimental determination of molar enthalpy of combustion of methanol
    • Hess's Law calculations and energy level diagrams for heat of formation
    • Fuels, fuel selection criteria, and hydrogen as an alternative fuel
  • Question 7: Reaction Kinetics and Chemical Equilibrium
    • Le Chatelier's principle and equilibrium shifts in reversible gas reactions
    • Catalytic decomposition of hydrogen peroxide, graphical data plotting, and rate of reaction determination
• File Size:

  315.17 KB
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  Chemistry
• Posted By:

  Caleb_Peter

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