ISC Class 12 Chemistry Important Topics 2025 and Usually Difficult, Confusing Concepts

ISC Class 12 Chemistry Important Topics 2025 and Usually Difficult, Confusing Concepts

ISC Class 12 Chemistry Important Topics 2025: CISCE will be conducting ISC Class 12 Chemistry (Subject Code: 234) on February 24, 2025 . To do well in this exam, students need to focus on major subjects outlined in their curriculum, which include different branches of chemistry: Organic, Inorganic, and Physical Chemistry. This guide highlights critical topics and points out areas that students often find challenging or confusing. By understanding these key areas, students can organize their study time more effectively and boost their confidence. With a well-structured study plan, they can maximize their chances of success in the exam.

ISC Class 12 Chemistry Important Topics 2025

Students preparing for ISC Class 12 Chemistry 2025 examination can find the important topics below:

• Chemical Kinetics (Unit of Rate Constant, Rate Law, Integrated Rate, Numercials, Graphs)
• D and F Block Elements (Oxidation State, Electronic Configuration, Complex Formation, Coloured Ions, Alloy and Interstitial Compound,  Metallic Bond, Catalytic Property)
• Solution (Colligative Properties, Concentration Terms, Ideal and Non-Ideal Solution, Henry Law, Rault’s Law, Van’t Hoff Factor)
• Electrochemistry (Electrochemical Cell, Nernst Equation, Faraday Law, Electrolytic Conductance)
• Iodoform Test
• Coordination Compounds (Nomenclature, ligands, Isomerism)
• Tollen’s Reagent
• Fertiling’s Reagent

ISC Class 12 Chemistry Difficult Topics 2025

Here are the topics that are found difficult by the candidates, which must be practiced more and more to save time during the examination.

• Van’t Hoff factor, degree of dissociation and experimental molecular weight.
• Chemical kinetics: Rate law expression, energy activation and numericals related to it.
• Chemistry Electrochemistry: Specific conductance and molar conductance numericals, calculation of emf and free energy change, degree of dissociation,
• Chemistry Coordination compounds: Nomenclature, isomerism and hybridisation.
• Chemistry d and f block elements: give reason-based questions.
• Chemistry Name organic reactions, balanced equations, chemical tests to distinguish between organic compounds and identifying organic compounds.
• Chemistry Biomolecules: Deficiency diseases, various properties of proteins, classification of carbohydrates as reducing and non-reducing sugars.

ISC Class 12 Chemistry Confusing Concepts 2025

Here are the concepts in ISC Class 12 Chemistry 2025 in which students generally got confused in the previous years below.

• Identification of the structure of the coordination compound and IUPAC nomenclature of
• the coordination compound.
• Chemistry Formula to solve numerical problems and unit conversion.
• Chemistry Organic conversions.
• Chemistry Identification of compounds in organic chemistry.
• Chemistry Chemical test to distinguish between a pair of organic compounds.
• Chemistry Organic reactions
• Chemistry Proper keywords for reasoning type questions from d and f block elements and also from organic compounds.
• Chemistry Concept of second law of Faraday and Kohlrausch’s law.
• Chemistry Electronic configuration of element and ions of ‘d’ and ‘f’ block elements.

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