Class 12 Chemistry Most Important Topics for RBSE Board 2026

If you are getting ready for the RBSE Class 12 Chemistry Board Exam 2026, this topic list is just what you need. It is based on the official PDF and an analysis of past RBSE question papers. These important chapter‑wise topics cover about 75-80% of the questions expected in the final exam. This guide is written in a straightforward, student‑friendly manner. It will help you understand what to study more, what to review frequently, and where you can usually earn the most marks.

1. Solutions (विलयन)

   Focus on molarity–molality, osmotic pressure, colligative properties, Van’t Hoff factor, Raoult’s law, Henry’s law, azeotropes, and Kf numericals.

2. Electrochemistry (वैद्युत रसायन)

   Very scoring chapter. Prepare Faraday’s laws, molar conductivity, Kohlrausch’s law, Nernst equation, SHE, Daniell & fuel cells, and numericals.

3. Chemical Kinetics (रासायनिक गतिकी)

   Important derivations: zero & first order reactions, half-life, Arrhenius equation, rate law, units of rate constant, effect of temperature and catalyst.

4. D- and F-Block Elements

   Theory based but scoring. Study magnetic moment, lanthanoid contraction, oxidation states, electronic configuration, catalytic properties, and electrode potentials.

5. Coordination Compounds (समन्वय यौगिक)

   Key topics: Werner’s theory, VBT, CFT, IUPAC naming, isomerism, ligands, magnetic properties, oxidation state, coordination number.

6. Haloalkanes and Haloarenes

   Focus on SN1–SN2, Saytzeff & Markovnikov rules, named reactions (Wurtz, Fittig, Swarts), optical activity, aryl halides, DDT.

7. Alcohols, Phenols and Ethers

   Important: dehydration, Williamson synthesis, Reimer-Tiemann, acidity of phenol, resonance, physical properties, boiling point trends.

8. Aldehydes, Ketones and Carboxylic Acids

   Revise aldol condensation, reductions (Clemmensen, Wolff-Kishner), nucleophilic addition, HVZ, Cannizzaro, acidity, IUPAC naming.

9. Amines

   High scoring. Prepare Hofmann bromamide, carbylamine, diazonium salts, basic strength, Hinsberg test, IUPAC naming.

10. Biomolecules

    Short-answer chapter. Focus on proteins, enzymes, vitamins, DNA vs RNA, glucose reactions, amino acids, polysaccharides.

Final Tips for RBSE 2026

• Practice numericals, derivations, and mechanisms.

• Revise formulas, IUPAC names, and reactions daily.

• Give extra time to Electrochemistry, Chemical Kinetics, and Organic Chemistry.

Conclusion

If you take these topics seriously, you can easily cover about 75-80% of the RBSE Class 12 Chemistry paper (2026). These chapters are highly scoring and are often included in board exams.