Summary

• Description:

  The MS Word document comprises Form 3 Chemistry Paper 1 End Term 3 2026 Exam with Marking Scheme. The PDF version is also available upon your request. The marking scheme is in a different document.

  This assessment evaluates core chemical competencies including stoichiometry, atomic structure, gas preparation, chemical bonding, allotropy, and industrial chemical processes. It is ideal for end-of-year school-based national assessment preparation towards the end of the term, and can also be effectively administered as a mid-term assessment for schools that have completed the syllabus early at the beginning of the term.

  • Duration: 2 Hours
  • Total Marks: 80 Marks
  • Number of Questions: 26 Questions (1 – 26)
  • Structure: 26 Compulsory Semi-Structured Questions (80 Marks)

  It covers the following topics:

  • Uses of gases in welding and commercial applications of oxygen
  • Electronic configuration and comparative reactivity of Group 2 metals (calcium and magnesium)
  • Relative atomic mass calculations from isotopic abundance data
  • Laboratory preparation and collection of oxygen from catalytic peroxide decomposition
  • Fractional distillation principles, fractionating column components, and industrial applications
  • Reaction of alkaline earth metals with cold water and collection of hydrogen gas
  • Dot-and-cross diagrams and ionic bond formation in metal oxides
  • Empirical formula determination from oxide reduction experiments
  • Volumetric analysis and stoichiometric molarity calculations for acid-base titrations
  • Structure, bonding, electrical conductivity, and uses of carbon allotropes (diamond and graphite)
  • Oxidation numbers and periodic table group classification
  • Separation of mixtures containing soluble and insoluble metallic carbonates
  • Physical properties and suitability of aluminium in household utensils
  • Writing balanced molecular and ionic equations for acid-carbonate reactions
  • Allotropes and chemical properties of concentrated sulphuric(VI) acid (dehydrating and oxidizing actions)
  • Thermal decomposition and mass changes of copper metal and copper(II) nitrate in open crucibles
  • Principles of paper chromatography, baseline, and identification of banned dye components
  • Avogadro's constant and calculation of total ions in standard electrolyte solutions
  • Heating curves, kinetic molecular theory, and changes of state for pure liquids
  • Industrial manufacture of sodium carbonate via the Solvay process
  • Qualitative analysis flowcharts involving lead compounds and amphoteric hydroxides
  • pH determination and classification of common laboratory and household substances
  • Catalytic oxidation of ammonia in the industrial synthesis of nitric(V) acid
  • Chemical composition of rust and economic considerations of corrosion
  • Frasch process for sulphur extraction: underground piping, superheated water, and physical properties
• File Size:

  1.66 MB
• Length:

  6 pages
• Category:

  Exams
• Level:

  Form 3
• Subject:

  Chemistry
• Posted By:

  Caleb_Peter

Enter your details below to initiate a payment using MPESA.