Summary

• Description:

  The MS Word document comprises the Form 3 Chemistry Paper 1 End Term 2 2025 Exam with Marking Scheme. The PDF version is also available upon your request. The marking scheme is in a different document.

  The examination paper contains 27 questions to be answered in 2 hours. The paper is marked out of a total of 80 marks.

  Key topics assessed in this exam include:

  • Structure and Bonding: This includes electronic configuration , dot and cross diagrams for ionic and covalent bonds , and allotropy.
  • The Mole Concept and Stoichiometry: Calculations involve empirical and molecular formulae , water of crystallization , reactions of acids , thermal decomposition , and precipitation.
  • Periodicity: Trends in atomic and ionic radii and properties of elements in the periodic table.
  • Gas Laws: Application of Graham's law of diffusion.
  • Acids, Bases, and Salts: This covers properties like deliquescence and efflorescence , preparation of salts , and distinguishing between strong and concentrated acids.
  • Electrochemistry: Concepts of electrical conductivity in substances.
  • Organic Chemistry: Combustion of hydrocarbons.
  • Metals: The process and prevention of rusting.
  • Separation Techniques: Principles and applications of fractional distillation.
  • Rates of Reaction and Energy Changes: Interpretation of heating curves for pure substances.
• Category:

  Exams
• Level:

  Form 3
• Subject:

  CHEMISTRY

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