Summary

• Description:

  The PDF document comprises MUSJET Chemistry Paper 1 2026 Pre-Mock Exam with Marking Scheme. The marking scheme is in a different document.

  It was a KCSE Chemistry Paper 1 examination aimed at testing broad concepts in inorganic, organic, physical, and analytical chemistry. Candidates can use this practice exam paper along with the marking scheme and answers to sharpen their problem-solving skills for KCSE exams.

  • Month Administered: July 2026
  • Duration: 2 Hours
  • Total Marks: 80
  • Number of Questions: 27 (Questions 1–27)
  • Structure: Single section featuring 27 structured short-answer theory and calculation questions

  It covers the following topics:

  • pH scale, indicators, and acid-carbonate reactions
  • Paper chromatography principles and Rf factor determination
  • Laboratory safety rules and volumetric measuring instruments
  • Effect of heat on hydrated copper(II) sulphate
  • Mass changes when heating metals vs. non-metals in air
  • Laboratory preparation and collection of oxygen gas
  • Reaction of magnesium with steam and hydrogen test
  • Atomic structure: Subatomic particles, isotopes, and ion notation
  • Stoichiometry: Molar gas calculations and relative atomic mass (RAM) determination
  • Periodicity: Electrical conductivity, melting points, and atomic radii trends in Period 3
  • IUPAC nomenclature and structural formulae of alkenes and alkynes
  • Graham's law of diffusion calculations
  • Combined gas law calculations
  • Chemical equilibrium and Le Chatelier's principle (pressure effects, energy level diagrams)
  • Electrolysis of molten copper(II) iodide
  • Periodic table trends: Atomic vs. ionic radii and dot-and-cross bonding diagrams
  • Qualitative analysis flowcharts and complex ion identification
  • Preparation of insoluble salts (lead(II) sulphate) by precipitation
  • Gay-Lussac's law and volumetric gas analysis
  • Nuclear chemistry and radioactive decay equations
  • Electrochemical cell e.m.f calculations
  • Faraday's laws of electrolysis and ion charge calculations
  • Separation of immiscible liquids using a separating funnel
  • Solvent extraction of oils using propanone
  • Applications of paper chromatography
  • Electron arrangement in polyatomic ions
  • Advantages of dry ice over ordinary ice
  • Gas collection methods (upward and downward delivery) and relative density comparison
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  CHEMISTRY

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