Summary

• Description:

  The MS Word document comprises Kabras West Sub County Chemistry Paper 1 2026 Joint 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 Paper 1 mock examination containing comprehensive theoretical questions spanning the entire secondary school chemistry syllabus. This download contains essential past questions together with marking scheme guidelines to help improve student exam performance.

  Duration: 2 Hours
  Total Marks: 80
  Number of Questions: 29

  It covers the following topics:

  • Physical Chemistry: Thermal decomposition mass changes, Graham's law of gaseous diffusion, pH scale, amphoteric properties, and chemical bond energy calculations (ΔH)

  • Organic Chemistry: Free radical substitution of alkanes with halogens, structural isomerism, and structural formulas of alkanols and alkanoic acids

  • Atomic Structure & Bonding: Isotopes, neutron calculations, empirical and molecular formula of hydrated salts (CuSO₄·nH₂O), coordinate (dative) bonding in Al₂Cl₆, and Lewis dot-and-cross structures (CO and NH₄⁺)

  • States of Matter & Solid Structures: Metallic, covalent network, ionic, and molecular solid classification based on melting points and electrical conductivity

  • Inorganic Chemistry: Industrial gas collection methods, reaction of steam with metals, charcoal jiko combustion reactions, the Contact Process for SO₃ production, halogen displacement reactions, and reaction of nitric(V) acid with non-metals

  • Volumetric Analysis: Titration stoichiometry and molar concentration calculations of ethanoic acid in commercial vinegar

  • Reaction Kinetics: Factors affecting reaction rates, including surface area and concentration curves

  • Electrochemistry: Cell notation, standard cell potential (E°) calculations, and oxidation state calculations of sulphur

  • Qualitative & Quantitative Analysis: Chemical differentiation of Cu²⁺ and Fe²⁺ using NaOH, dehydrating and oxidizing effects of concentrated H₂SO₄, and filtration techniques

• File Size:

  292.15 KB
• Length:

  11 pages
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  CHEMISTRY
• Posted By:

  Caleb_Peter

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