Summary

• Description:

  The MS Word document comprises Kimaeti Sub-County Muslim Schools 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 mock examination.

  This paper tests broad theoretical chemistry competencies including stoichiometry, gas laws, chemical bonding, organic nomenclature, thermochemistry, and qualitative chemical analysis. It is an essential assessment for testing speed and conceptual accuracy in chemistry.

  • Duration: 2 Hours
  • Total Marks: 80 marks
  • Number of Questions: 28 questions (Questions 1 to 28)
  • Structure: Single compulsory section containing 28 structured short-answer and computational questions.

  It covers the following topics:

  • Thermogravimetry: Mass changes observed when heating copper metal and copper (II) nitrate
  • Gas laws: Graham's law of diffusion and relative molecular mass calculations
  • Organic chemistry: Free radical substitution reaction of propane with chlorine and structural isomerism
  • Industrial chemistry: Oxygen-acetylene gas mixtures in high-temperature welding
  • Atomic structure: Mass numbers, atomic numbers, isotopes, and neutron calculations
  • Stoichiometry: Determining water of crystallization in hydrated copper (II) sulfate crystals
  • Acids, bases, and salts: pH scale, amphoteric behavior of aluminium oxide, and neutralization reactions
  • Structure and bonding: Melting point differences between ionic lattices and molecular covalent compounds
  • Classification of solids: Metallic, covalent network, ionic, and molecular crystalline solids
  • Laboratory preparation of gases: Upward and downward delivery gas collection methods
  • Thermochemistry: Bond energy calculations and enthalpy change of methane chlorination
  • Reactivity series: Reaction kinetics between heated aluminium and steam
  • Volumetric titration: Acid-base titration and molarity determination of ethanoic acid in commercial vinegar
  • Carbon and its compounds: Combustion reactions and gaseous zones in a charcoal brazier (Jiko)
  • Separation of mixtures: Fractional purification and filtration of copper (II) oxide and sodium chloride
  • Reaction kinetics: Rate curves of zinc powder versus zinc granules in sulfuric (VI) acid
  • Sulfur and its compounds: Contact process preparation of sulfur (VI) oxide and catalytic conversion
  • Halogens: Displacement reactions of chlorine gas with potassium iodide solution
  • Chemical bonding: Coordinate (dative) bonding and dimerisation in aluminium chloride
  • Chemical reactions: Burning magnesium in atmospheric nitrogen and oxygen
  • Electrochemistry: Electrochemical cell notation, standard electrode potentials, and cell EMF calculations
  • Nitric acid chemistry: Oxidation of sulfur by concentrated nitric (V) acid and environmental hazards of nitrogen oxides
  • Lewis structures: Dot and cross diagrams for carbon (II) oxide and ammonium ions
  • Qualitative analysis: Sodium hydroxide precipitation test to distinguish copper (II) and iron (II) ions
  • Dehydration reactions: Dehydrating properties of concentrated sulfuric (VI) acid on carbohydrates and hydrated salts
  • Thermochemistry: Experimental calculation of molar heat of neutralization
  • Oxidation numbers: Determining oxidation numbers of sulfur in polyatomic oxoanions
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  CHEMISTRY
• Posted By:

  Caleb_Peter

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