Summary

• Description:

  The MS Word document comprises Nakuru North Joint Evaluation Chemistry Paper 1 2025 Mock Exam with Marking Scheme. The PDF version is also available upon your request. The marking scheme is in a different document.

  It is a KCSE Chemistry (Theory) Paper 1 (233/1) Nakuru North Joint Evaluation Mock 2025 examination (End of Term 2).

  • Duration: 2 Hours
  • Total Marks: 80
  • Number of Questions: 29 (Questions 1–29)
  • Marking Scheme: The marking scheme is in a different document.

  It covers the following topics:

  • Organic chemistry: homologous series (alkynes), sources of alkanes, ethanol reactions and tests
  • Electrochemistry: electrolysis setups and products (including concentrated sodium chloride/brine)
  • Chemical energetics: lattice energy and interpreting energy level diagrams
  • Gas laws: Boyle’s law graphs and combined gas calculations
  • Radioactivity: half-life calculations (including decay over multiple half-lives)
  • Water chemistry: hardness of water and its disadvantages
  • Preparation and uses of gases: hydrogen chloride preparation/uses; oxygen preparation and uses
  • Reversible reactions/thermal decomposition: dehydration and rehydration processes (e.g., hydrated salts)
  • Atomic structure and bonding: ionic formation (M3+), chlorides, and structure of compounds
  • Rates of reaction: effect of temperature and other factors (thiosulphate + hydrochloric acid)
  • Redox reactions: ammonia reducing copper(II) oxide; catalytic oxidation products with platinum
  • Reactivity series: comparing metals using reactions with air, water, and dilute sulphuric acid
  • Acids, bases and indicators: identifying indicators and classifying substances as acidic/basic/neutral
  • Allotropy: allotropes of sulphur; graphite properties and conductivity
  • Properties of sulphuric(VI) acid: reactions with copper and alcohols (oxidising/dehydrating behaviour)
  • Electrode potentials: interpreting E° values and displacement feasibility
  • Intermolecular forces and bonding: sublimation of iodine and bonds involved
  • Separation techniques: obtaining barium sulphate, ammonium chloride and sodium chloride from a mixture
  • Periodic trends: atomic radius trend across atomic number and uses of sodium
  • Soil pH and neutralisation: adjusting alkaline soil for crops that prefer acidic conditions
  • Preparation of salts: preparing pure dry calcium carbonate from calcium nitrate solution
  • Empirical/molecular formula calculations: composition-based hydrocarbon formula determination
  • Qualitative tests for gases: distinguishing CO and CO2 using limewater; CO2 role in fire extinguishers
  • Fuel chemistry: heating value of fuels and factors considered when choosing a fuel
  • Chromatography: interpreting paper chromatograms, identifying pure substances, and mixtures
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  CHEMISTRY

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