Summary

• Description:

  The PDF document comprises KALA Joint Trials 2024 Chemistry Paper 2 Exam with Answers and Marking Scheme. The marking scheme is in a different document.

  It was a KCSE Chemistry Paper 2 (233/2) Joint Trial examination administered in July 2024.

  • Duration: 2 Hours
  • Total Marks: 80
  • Number of Questions: 7
  • Instructions: Candidates were required to answer all questions and show all necessary workings. Non-programmable silent electronic calculators and KNEC mathematical tables were allowed.

  The paper consisted of structured theory questions requiring explanations of chemical principles, interpretation of data, drawing of diagrams, and chemical calculations.

  It covered the following topics:

  • Isotopes and atomic structure including electron arrangement
  • Radioactive decay, half-life calculations, and nuclear equations
  • Energy level diagrams and activation energy in chemical reactions
  • Reactions of magnesium with oxygen and water
  • Periodic trends including atomic and ionic radii
  • Properties of oxides and ionic bonding using dot-and-cross diagrams
  • Separation of mixtures using solubility and precipitation techniques
  • Redox reactions and oxidation number analysis
  • Organic chemistry including reactions of alkenes, alcohols, carboxylic acids, and haloalkanes
  • Polymerization reactions and formation of polymers
  • Empirical and molecular formula determination of organic acids
  • Acid–base titration calculations and determination of basicity of acids
  • Qualitative analysis and precipitation reactions
  • Solubility of hydrogen chloride in water and organic solvents
  • Hardness of water and methods of softening hard water
  • Electrolysis of concentrated sodium chloride solution
  • Calculation of volume of gases produced during electrolysis
  • Electrode potentials and electrochemical cells
  • Identification and properties of carbon monoxide and carbon dioxide
  • Preparation and properties of nitrogen (I) oxide
  • Neutralization reactions and determination of enthalpy of neutralization
  • Graph plotting and interpretation of temperature change during reactions
  • Lattice energy and hydration energy calculations
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  CHEMISTRY

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