Summary

• Description:

  The MS Word document comprises CEKENAS Chemistry Paper 3 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 3 practical examination evaluating laboratory competency in thermochemistry, redox titrations, and systematic qualitative analysis. This paper provides practical hands-on preparation for the KCSE chemistry practical exam, available for PDF download with marking scheme details.

  • Month Administered: March/April 2026
  • Duration: 2 ¼ Hours
  • Total Marks: 40 Marks
  • Number of Questions: 3 (Questions 1–3)
  • Structure: Three compulsory practical questions focusing on quantitative thermochemistry and redox titration (Question 1, 20 marks), organic qualitative analysis (Question 2, 8 marks), and inorganic qualitative analysis (Question 3, 12 marks).

  It covers the following topics:

  • Quantitative analysis & Thermochemistry (Determining molar enthalpy of displacement of copper by iron metal, temperature-time graph plotting, heat change calculation)
  • Redox volumetric analysis (Redox titration of unreacted Fe2+ ions using standardized acidified potassium manganate (VII) solution)
  • Organic qualitative analysis (Testing functional groups in liquid organic compound A using solubility, acidified KMnO4, acidified K2Cr2O7, and NaHCO3)
  • Inorganic qualitative analysis (Systematic cation and anion identification in solid B using NaOH, H2SO4, Pb(NO3)2, Ba(NO3)2, and ammonium salt gas test)
• Length:

  8 pages
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  CHEMISTRY

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