Planning to prepare for the NSEC 2026-27? The first major step is to know what to study & what level of conceptual depth the exam demands. As per the Indian Association of Physics Teachers (IAPT) guidelines, the NSEC syllabus covers Organic Chemistry, Inorganic Chemistry, & Physical Chemistry up to Class 12 (senior-secondary level). However, IAPT also states that Olympiad questions are non-conventional and more challenging than any regular school-level problems. NSEC Exam is designed to test students’ knowledge of Chemistry, not just memorisation of NCERT reactions, definitions, and formulas, especially for those who want to pursue Chemistry in the future.
In simpler terms, the NSEC Olympiad syllabus consists of Class 11 + Class 12 Chemistry core topics. In this guide, we are going to unravel the in-depth syllabus, chapter-wise topics along with their weightage.
Following the trend of previous years, N Smart Olympiad experts have created a list of section-wise NSEC syllabus weightage. Please note that this list is not official data; rather follows the pattern of weightage of past years’ papers.
| Chapters | Covered Topics | Weightage | Priority |
| Some Basic Concepts of Chemistry | Mole concept; Stoichiometry; Atomic and molecular masses; Percentage composition; Empirical and molecular formulae; Concentration terms; Limiting reagent | 2-3% | Medium |
| Structure of Atom | Atomic models; Quantum numbers; Electronic configuration; Orbitals; Electromagnetic radiation; Photoelectric effect; Hydrogen spectrum | 5-7% | High |
| Classification of Elements & Periodicity | Periodic trends; Atomic radius; Ionisation enthalpy; Electron gain enthalpy; Electronegativity; Valency; Oxidation states | 2-3% | Medium |
| Chemical Bonding & Molecular Structure | Ionic bonding; Covalent bonding; Lewis structures; VSEPR theory; Hybridisation; Molecular orbitals; Hydrogen bonding; Bond parameters | 3-7% | Very High |
| Thermodynamics | System and surroundings; Work and heat; Internal energy; Enthalpy; Hess's law; Entropy; Gibbs energy; Spontaneity | 3-5% | High |
| Equilibrium | Equilibrium constants; Le Chatelier's principle; Acid-base equilibrium; pH; Buffer solutions; Solubility equilibrium; Common-ion effect | 3-5% | High |
| Redox Reactions | Oxidation and reduction; Oxidation numbers; Balancing redox reactions; Applications of redox chemistry | 2-3% | Medium |
| Organic Chemistry: Basic Principles | IUPAC nomenclature; Isomerism; Electronic effects; Reaction intermediates; Types of organic reactions; Acidity and basicity; General organic reaction mechanisms | 5-7% | Very High |
| Hydrocarbons | Alkanes; Alkenes; Alkynes; Aromatic hydrocarbons; Addition reactions; Substitution reactions; Electrophilic reactions | 7-8% | Very High |
| Chapters | Covered Topics | Weightage | Priority |
| Solid State | Crystal structures; Unit cells; Packing efficiency; Density; Defects; Electrical properties | 0-2% | Low |
| Solutions | Concentration units; Raoult's law; Colligative properties; Osmosis; Abnormal molar masses; van't Hoff factor | 3-4% | Medium |
| Electrochemistry | Electrochemical cells; Electrode potential; Nernst equation; Gibbs energy and cell potential; Conductance; Electrolysis; Faraday's laws | 3-5% | High |
| Chemical Kinetics | Rate of reaction; Rate laws; Order and molecularity; Integrated rate equations; Half-life; Arrhenius equation; Activation energy | 3-5% | High |
| Surface Chemistry | Adsorption; Catalysis; Colloids; Emulsions | 0-2% | Low |
| Coordination Compounds | Ligands; Coordination number; Nomenclature; Isomerism; Bonding theories; Crystal field concepts; Magnetic behaviour; Stability | 5-8% | Very High |
| Haloalkanes and Haloarenes | Nucleophilic substitution; Elimination; Reactivity; Mechanisms | 3-5% | High |
| Alcohols, Phenols and Ethers | Preparation; Reactions; Acidity; Mechanisms; Comparative reactivity | 2-3% | Medium |
| Aldehydes, Ketones and Carboxylic Acids | Carbonyl chemistry; Nucleophilic addition; Oxidation-reduction; Aldol reaction; Cannizzaro reaction; Acidity of carboxylic acids; Important named reactions | 8-10% | Very High |
| Amines | Basicity; Preparation; Reactions; Diazonium chemistry; Aromatic amines | 2-3% | Medium |
| Biomolecules, Polymers and Chemistry in Everyday Life | Carbohydrates; Proteins; Amino Acids; Enzymes; Nucleic Acids & Vitamins | 2-3% | Medium |
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The NSEC syllabus 2026-27 is broad and covers Organic, Inorganic, & Physical Chemistry at the senior-secondary level, with the inclusion of lower-class foundations as well. Start with high-priority chapters like Chemical Bonding, Thermodynamics, Equilibrium, Electrochemistry, and build your concepts around unconventional problem-solving.
Yes, as per IPAT’s guidelines, the NSEC syllabus broadly follows the CBSE Class 11 & Class 12 Chemistry syllabus, but the difficulty level is much higher than regular school exams.
IAPT dictates the NSEC syllabus equivalent to the Class 11 & 12 CBSE curriculum, including Organic Chemistry, Inorganic Chemistry, & Physical Chemistry.