Summary

• Description:

  The MS Word document comprises Mumias West Sub-County Joint Evaluation Chemistry Paper 2 May 2026 Pre-Mock Exam with Marking Scheme. The marking scheme is in a different document.

  It was a KCSE Chemistry Paper 2 (Theory) examination. This paper tests deeper analytical reasoning in chemistry, including periodic table trends, industrial extraction of metals, reaction rates, organic chemistry, and electrochemistry, through 7 structured questions requiring detailed explanations and calculations.

  • Month Administered: May 2026
  • Duration: 2 hours
  • Total Marks: 80
  • Number of Questions: 7 (Questions 1–7)
  • Structure: All questions compulsory; marks range from 10 to 13 per question; mathematical tables and calculators permitted

  It covers the following topics:

  • Periodic table — oxidation states, reducing and oxidising agents, noble gases, atomic radii, and ionisation energy
  • Industrial extraction of sodium (Down's process) — electrolyte, electrode choice, steel diaphragm function
  • Electrochemistry — standard electrode potential, electroplating, electrolysis of aqueous copper (II) sulphate, electron flow direction
  • Reaction of metals with nitric acid — explanation of observed behaviour
  • Bonding — dot and cross diagrams between elements from the periodic table
  • Atomic mass vs. atomic number relationship (role of neutrons)
  • Electroplating calculations (silver deposition — current, time, Faraday's constant)
• File Size:

  941.17 KB
• Length:

  12 pages
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  CHEMISTRY
• Posted By:

  Caleb_Peter

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