Summary

• Description:

  The MS Word document comprises Form 4 Chemistry Paper 1 Mid Term 2 2026 Exam with Marking Scheme. The PDF version is also available upon your request. The marking scheme is in a different document.

  This paper assesses Form 4 students across a broad range of chemistry topics including physical chemistry, atomic structure, organic chemistry, and electrochemistry, testing both conceptual understanding and problem-solving skills in line with the KCSE Chemistry Paper 1 format.

  • Duration: 2 Hours
  • Number of Questions: 27 questions (Questions 1–27)
  • Structure: All questions compulsory, answered in the spaces provided

  It covers the following topics:

  • Graham's Law of diffusion — statement and calculation
  • Endothermic and exothermic physical processes
  • Atomic structure — protons, neutrons, dot-and-cross diagrams
  • Preparation and collection of carbon (II) oxide
  • Solubility curves — gases and salts
  • Industrial chemistry flow charts
  • Electrochemistry concepts
  • Properties of elements — electrical conductivity, ductility, reactivity with water
  • Isotopes and percentage abundance calculations (Potassium)
  • Acid-base chemistry — Brønsted-Lowry theory (ammonia and water reaction)
  • Reaction of gases with metals (magnesium and nitrogen)
  • Organic chemistry — isomers and homologous series
  • Allotropy — carbon allotropes (diamond and graphite)
  • Testing for sulphate ions in water
  • Separation techniques — sublimation (sodium chloride and iodine)
  • Chlorine water reactions — bleaching and gas production
  • Sodium and propanol reaction
• File Size:

  218.31 KB
• Length:

  8 pages
• Category:

  Exams
• Level:

  Form 4
• Subject:

  CHEMISTRY
• Posted By:

  Caleb_Peter

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