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VKC Prelims Notes: Geo-Scientist Prelims Chemistry

Paper II, unit by unit in the order of the UPSC syllabus. Each unit has the theory, 12 practice questions and every previous year question of 2021–2026 at the end, plus two-page short notes for revision.

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The 12 units

Open with VKC Basic or the GS + Chemistry Prelims test series. The first part of every unit is open to all. For Mains, see the Mains notes.

  • Unit 1 (C1) Chemical periodicity
    94 PYQs in 2021–2026, about 16 a year    Notes Short notes
  • Unit 2 (C2) Chemical bonding and structure
    83 PYQs in 2021–2026, about 14 a year    Notes Short notes
  • Unit 3 (C3) Acids and bases
    39 PYQs in 2021–2026, about 6 a year    Notes Short notes
  • Unit 4 (C4) Theoretical basis of quantitative inorganic analysis
    24 PYQs in 2021–2026, about 4 a year    Notes Short notes
  • Unit 5 (C5) Kinetic theory and the gaseous state
    46 PYQs in 2021–2026, about 8 a year    Notes Short notes
  • Unit 6 (C6) Chemical thermodynamics and chemical equilibrium
    78 PYQs in 2021–2026, about 13 a year    Notes Short notes
  • Unit 7 (C7) Solutions of non-electrolytes
    42 PYQs in 2021–2026, about 7 a year    Notes Short notes
  • Unit 8 (C8) Electrochemistry
    74 PYQs in 2021–2026, about 12 a year    Notes Short notes
  • Unit 9 (C9) Basic organic chemistry
    36 PYQs in 2021–2026, about 6 a year    Notes Short notes
  • Unit 10 (C10) Stereochemistry
    51 PYQs in 2021–2026, about 8 a year    Notes Short notes
  • Unit 11 (C11) Types of organic reactions
    113 PYQs in 2021–2026, about 19 a year    Notes Short notes
  • Unit 12 (C12) Molecular rearrangements
    40 PYQs in 2021–2026, about 7 a year    Notes Short notes