Summary

• Description:

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

  The exam is a Theory Paper 1 with a duration of 2 hours. It consists of 28 compulsory short-answer and structured questions testing various principles of chemistry, including calculations, experimental procedures, and theoretical concepts. The questions require students to interpret diagrams, write chemical equations, perform stoichiometric calculations, and explain chemical phenomena.

  The document covers the following topics:

  • Laboratory Apparatus (Sketching a deflagrating spoon and reasons for using glass apparatus)
  • Qualitative Analysis (Observations when Sodium Carbonate is added to Aluminum Chloride)
  • Reactivity Series (Displacement reactions to determine the order of reactivity of metals)
  • Salt Preparation (Preparation of Lead (II) Chloride)
  • Stoichiometry and Mole Concept:
    • Empirical formula calculation (Oxide of Tin)
    • Calculation of mass of precipitate formed (Lead (II) Nitrate and Sodium Sulphate)
    • Molarity and Relative Atomic Mass calculations (Titration of Sodium Carbonate and Nitric Acid; Metal X and Sulphuric Acid)
    • Gas laws (Gay Lussac’s Law and General Gas Equation calculations)
  • Electrolysis (Electrolysis of Brine/Sodium Chloride solution)
  • Organic Chemistry:
    • Alkanes and Alkenes (Preparation of Ethane, Reaction with Bromine water)
    • Alkynes (Preparation of Ethyne from Calcium Carbide, distinguishing tests, uses)
    • Isomerism (Structural isomers of C5H10)
    • IUPAC Naming of organic compounds
  • Nitrogen and its Compounds (Laboratory preparation of Nitrogen (II) Oxide)
  • Sulphur and its Compounds:
    • Preparation of Sulphur (IV) Oxide
    • Ores of Sulphur
    • Reaction of Sulphur (IV) Oxide with Potassium Manganate (VII)
  • Structure and Bonding:
    • Bonding diagrams (Metal X and Chlorine)
    • Allotropes of Carbon (Structure and uses of Diamond and Graphite)
    • Properties of substances based on structure (Conductivity, Solubility, Melting/Boiling points)
  • Industrial Processes (The Solvay Process scheme and equations)
  • Complex Ion Formation (Reaction of Ammonia gas with Copper (II) Sulphate)
  • Bunsen Burner (Reasons for using non-luminous flame)
  • Reaction of Metals with Water (Calcium and Water)
  • Rusting (Methods of preventing rusting of metallic spatulas)
  • Oxygen (Laboratory preparation chemicals and commercial uses)
• Category:

  Exams
• Level:

  Form 4
• Subject:

  CHEMISTRY

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