Summary

• Description:

  The MS Word document comprises CEKENAS Chemistry Paper 2 2026 Pre-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 CEKENAS Form 4 Chemistry Paper 2 theory examination evaluating in-depth concepts in periodic trends, organic reaction pathways, industrial processes, and solubility curves. This exam is structured to enhance analytical problem-solving skills for KCSE candidates, accessible as a PDF download with complete marking scheme solutions.

  • Month Administered: March/April 2026
  • Duration: 2 Hours
  • Total Marks: 80 Marks
  • Number of Questions: 7 (Questions 1–7)
  • Structure: Compulsory long-structured theory section containing 7 major multi-part questions.

  It covers the following topics:

  • Periodic table trends and atomic structure (Calcium ionization energies, physical properties of Period 3 chlorides NaCl vs. AlCl3, aluminum applications, blue litmus test on AlCl3 solution, Lewis structures, ionic radii comparisons)
  • Comprehensive organic reaction scheme (Alkanes, alkenes, alkanols, alkanoic acids, esters, halogenoalkanes, addition polymerization, oxidation, esterification, dehydration mechanisms)
  • Applied inorganic chemistry (Metal pickling, lead (II) nitrate reactions with HCl, volumetric analysis titrations of HCl with KOH, inverted funnel arrangement for gas dissolution)
  • Industrial manufacture of sulfuric (VI) acid via Contact Process (Frasch process for sulfur, chamber reactions, purification, catalytic oxidation of SO2, temperature/pressure optimization, pollution evidence and mitigation)
  • Carbon compounds and industrial sodium carbonate (Solvay process for Na2CO3, raw materials, fractional crystallization, thermal decomposition of NaHCO3, CO2 preparation and CO properties)
  • Nitrogen chemistry and industrial nitric (V) acid (Haber process conditions, Ostwald process catalytic oxidation of ammonia to nitric acid, copper reactions with nitric acid, complex ion formation with excess ammonia)
  • Solubility and crystallization kinetics (Plotting potassium nitrate solubility curve, solubility determination at specific temperatures, mass of crystals precipitating on cooling, molarity calculations)
• File Size:

  643.65 KB
• Length:

  12 pages
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  CHEMISTRY
• Posted By:

  Caleb_Peter

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