Summary

• Description:

  The MS Word document comprises LENANA SCHOOL NAIROBI INTERNAL EXAMS Chemistry Paper 3 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 Paper 3 examination.

  This practical examination evaluates laboratory manipulative skills, quantitative chemical analysis, and systematic qualitative inorganic and organic analysis. It assesses accuracy in thermochemical data collection, acid-base volumetric titrations, and functional group deductions.

  • Total Marks: 40
  • Number of Questions: 3 (Questions 1-3)
  • Structure: Question 1 (16 marks, thermochemistry and titration), Question 2 (14 marks, inorganic qualitative analysis), and Question 3 (10 marks, organic qualitative analysis).

  It covers the following topics:

  • Thermochemistry and volumetric analysis: Determination of enthalpy of solution of anhydrous sodium carbonate and back-titration standardization with hydrochloric acid
  • Inorganic qualitative analysis: Systematic identification of cations and anions using aqueous sodium hydroxide, aqueous ammonia, barium nitrate, and nitrate reduction tests
  • Organic qualitative analysis: Ignition tests, tests for unsaturation using bromine water, testing for carboxylic acids using sodium carbonate, and oxidation tests using acidified potassium dichromate (VI)
• File Size:

  27.25 KB
• Length:

  6 pages
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  Chemistry
• Posted By:

  Caleb_Peter

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