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Tamil Nadu Board Class 12 Chemistry — Formula Sheet

Tamil Nadu Board Class 12 Chemistry formula sheet, chapter by chapter — 26 formulas across 7 chapters. Follows the TN DGE syllabus.

How to Use the Formula Sheet

  1. Write, don't just read — writing each formula out helps it stick.
  2. Understand the derivation — you can rebuild a formula you half-remember.
  3. Group related formulas — link the ones that build on each other.
  4. Test yourself — cover the sheet and write the formulas from memory.

Chapter-Wise Formulas — 7 Chapters

Pure water undergoes self-ionisation (auto-ionisation): H₂O + H₂O ⇌ H₃O⁺ + OH⁻
Ionic product of water Kw = [H₃O⁺][OH⁻] = 1 × 10⁻¹⁴ at 25°C
CH₃COONa → Na⁺ + CH₃COO⁻ (complete dissociation of salt)
Examples: BF₃ + NH₃ → F₃B←NH₃.
The ionic product of water (Kw) = [H₃O⁺][OH⁻] = 1.0 × 10⁻¹⁴ at 25°C.
The full Ionic Equilibrium formula sheet
Resistance (R) is inversely proportional to conductance (C): C = 1/R
Resistivity (ρ) depends on the nature of the electrolyte and is defined as R = ρ(l/A)
At equilibrium (when Ecell = 0): ΔG° = -nFEcell° = -RT ln(Keq) = 0, so Keq = 1 doesn't mean K=1
The full Electro Chemistry formula sheet
3d series: Sc (Z=21) to Zn (Z=30) — 4th period, 10 elements.
The general electronic configuration of d-block elements is [Noble gas](n-1)d¹⁻¹⁰ns¹⁻² where n = 4 to 7.
The full Transition and Inner Transition Elements formula sheet

4 more chapters below

Formula sheets for all 7 chapters with formulas.

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Frequently Asked Questions

Where can I find Tamil Nadu Board Class 12 Chemistry Formula Sheet?

This page has formula sheet for 7 chapters of Tamil Nadu Board Class 12 Chemistry for the board exams 2027. Each chapter links to its own page with the full set.

Go through the syllabus first, then work chapter by chapter: learn the ideas, practise questions, and revise with notes and flashcards. Leave time at the end to revise every chapter once more under timed conditions.

Learn the formulas you use most first, and understand what each symbol means so you can apply them. Knowing where a formula comes from helps you rebuild it if you forget it in the exam.

Browse Formula Sheet by Chapter

7 chapters

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