Overview
Class 11 Samacheer Kalvi Chemistry lays the theoretical foundation for all of Class 12 and NEET. Invest time now — every chapter here directly feeds into Class 12 topics.
Volume 1 — Chapter Summary
| Chapter | Key Topics | Board Weightage | NEET Weightage |
|---|---|---|---|
| 1. Basic Concepts | Mole concept, stoichiometry | High | Medium |
| 2. Quantum Model of Atom | Quantum numbers, electronic config | High | High |
| 3. Periodic Classification | Periodic trends, anomalies | High | High |
| 4. Hydrogen | Hydrides, H₂O₂, heavy water | Medium | Low |
| 5. Alkali & Alkaline Earth | Industrial compounds, flame colours | Medium | Medium |
| 6. Gaseous State | Gas laws, KMT, van der Waals | High | High |
| 7. Thermodynamics | ΔH, ΔG, Hess's law, spontaneity | Very High | Very High |
Volume 2 — Chapter Summary
| Chapter | Key Topics | Board Weightage | NEET Weightage |
|---|---|---|---|
| 8. Equilibrium | Kp, Kc, Le Chatelier, pH, buffer | Very High | Very High |
| 9. Solutions | Colligative properties, van't Hoff | High | High |
| 10. Chemical Bonding | VSEPR, hybridisation, MO theory | Very High | Very High |
| 11. Organic Basics | IUPAC, isomerism, functional groups | High | High |
| 12. Organic Reactions | Electronic effects, intermediates | High | Very High |
Exam Strategy
For board exams: 1. Complete all NCERT-equivalent Samacheer textbook exercises first 2. Practise all in-text and back-exercise problems — many appear verbatim in boards 3. Learn all chemical equations for industrial preparations (NaOH, Na₂CO₃) 4. Practise 5-mark derivations: Hess's law, Kp–Kc, osmotic pressure
For NEET: 1. Chemical bonding (VSEPR, MO theory): 2–3 questions every year 2. Thermodynamics (ΔG, enthalpy types): 2–3 questions every year 3. Equilibrium (Kp, Kc, Le Chatelier, pH): 3–5 questions every year 4. Organic electronic effects and intermediates: 2–3 questions
Time Allocation (3-Month Plan)
| Month | Focus |
|---|---|
| Month 1 | Chapters 1–5 (Physical chemistry foundations) |
| Month 2 | Chapters 6–9 (Quantitative chemistry) |
| Month 3 | Chapters 10–12 + Revision + Model papers |
High-Yield One-Liners for MCQs
- Molar volume at STP (1 bar) = 22.7 L; at old STP (1 atm) = 22.4 L
- O₂ is paramagnetic (bond order = 2, 2 unpaired electrons)
- Highest EN: F (4.0 Pauling); highest IE: He; largest atom: Cs
- Cr: [Ar] 3d⁵ 4s¹; Cu: [Ar] 3d¹⁰ 4s¹ (exceptions)
- ΔG < 0: spontaneous; ΔG = 0: equilibrium; ΔG > 0: non-spontaneous
- Neutralisation enthalpy of strong acid + strong base = −57.3 kJ/mol