Summary

• Description:

  The MS Word document comprises Grade 10 Chemistry 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 exam tests Grade 10 Chemistry learners on atomic structure, chemical bonding, the periodic table, and properties of substances — assessing the conceptual and analytical chemistry competencies stipulated in the KCBE Senior School science pathway.

  • Month Administered: June 2026
  • Duration: 2 Hours
  • Total Marks: 80 (Section A: 30 marks; Section B: 50 marks)
  • Number of Questions: Structured across Section A and Section B
  • Structure:
    • Section A (30 marks) — Short-answer questions; all compulsory
    • Section B (50 marks) — Structured/extended-response questions; all compulsory

  It covers the following topics:

  • Section A
    • Branches of chemistry — organic chemistry (carbon compounds)
    • Pharmaceutical chemistry — meaning of dosage and drug abuse effects
    • Atomic structure — definition of atom, atomic number of sodium, Rutherford atomic model, electronic configuration of Neon
    • Classification of elements — noble/inert gases, vertical columns (groups) of the periodic table
    • Chemical bonding — ionic bonding (sodium chloride), isotopes definition
    • Chemical equations — balancing equations
    • Environmental chemistry — gases produced during combustion of hydrocarbons
    • Sub-atomic particles — charge of a proton
  • Section B
    • Properties of substances — melting and boiling points, electrical conductivity in solid and liquid states
    • Ionic compounds — why NaCl does not conduct electricity at room temperature but does when molten
    • Solubility and molecular structure — solubility of ammonia in water; ammonium ion bonding
    • Allotropes — definition, fullerenes, separation of fullerenes from soot
    • Graphite — conductivity as a non-metal
    • Periodic table analysis — identifying metallic and molecular structures, atomic radii comparisons, bond types between elements, metalloids, reactivity trends
    • Chemical reactions and schemes — identifying solids, writing balanced equations, complex ion formulas
    • Electron dot structures — bonding in NH₂⁻, S₈, and Carbon (II) Oxide
• Category:

  Exams
• Level:

  Grade 10
• Subject:

  CHEMISTRY

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