As you gear up for the JEE Mains 2025, it’s crucial to understand the exam’s structure and the specific demands of each section, particularly Chemistry. This article is designed to guide you through the exam pattern, focusing on the Chemistry portion, which is divided into Physical, Organic, and Inorganic Chemistry. Each area has distinct topics and weightage, which can significantly influence your study plan and preparation strategy. By familiarizing yourself with the chapter-wise weightage and important topics, you’ll be able to prioritize your studies effectively, ensuring that you allocate time wisely and improve your chances of excelling in this competitive exam. Let’s dive into the details and set the foundation for your successful JEE Mains preparation..
JEE Mains 2025 Exam Pattern and Structure
The JEE Mains exam is conducted by the National Testing Agency (NTA) and serves as the entrance test for various undergraduate engineering courses. It is held twice a year, and students can appear for both sessions.
| Particulars | BTech |
| Exam mode | Online (Computer based) |
| Number of sections and subjects | 3 (Physics, Chemistry, and Mathematics) |
| Duration of exam | 3 hours (180 minutes)4 hours for PwD candidates |
| Type of questions | MCQs: 4 options with only 1 correct optionNumerical Value Questions: Questions whose answers are to be filled in as a numerical value |
| Section A (MCQ) | Mathematics: 20Physics: 20Chemistry: 20 |
| Section B (Numerical Value) | Mathematics: 5Physics: 5Chemistry: 5In Section B, candidates have to attempt all five questions from each section. |
| Total questions | 75 |
| JEE Mains Total Marks | 300 marks |
| Language of paper | Assamese, Bengali, Kannada, Malayalam, Marathi, Odia, Punjabi, Tamil, Telugu, Urdu in addition to Hindi, English, and Gujarati |
The exam consists of three subjects: Physics, Chemistry, and Mathematics. Each subject is divided into two parts:
- Part 1: Multiple Choice Questions (MCQs)
- Part 2: Numerical Value-based Questions
The exam consists of a total of 75 questions, with 25 questions in each subject. Each question is worth 4 marks, and incorrect answers result in a deduction of 1 mark. The total marks for the exam are 300.
The exam duration is 3 hours. The distribution of questions and marks is as follows:
- Physics: 25 questions
- Chemistry: 25 questions
- Mathematics: 25 questions
JEE Mains is conducted in online mode, and candidates must complete the exam within the given time frame. The exam is objective in nature, with questions based on the syllabus prescribed by the National Council of Educational Research and Training (NCERT) for classes 11 and 12.
Chemistry Chapter-wise Weightage for JEE Mains (2025)
Chemistry is often considered the most scoring subject in JEE Main, largely due to the fact that it contains more straightforward and memory-based questions compared to Physics and Mathematics. The Chemistry syllabus can be divided into three parts: Physical Chemistry, Organic Chemistry, and Inorganic Chemistry. Here are the important chapters in JEE Main Chemistry along with their approximate weightage:
| Topics | No of Questions | Marks | Weightage (%) |
| Transition Elements and Coordination Chemistry | 3 | 12 | 10 |
| Periodic table and Representative Elements | 3 | 12 | 10 |
| Thermodynamics And Gaseous State | 2 | 8 | 6.6 |
| Atomic Structure | 2 | 8 | 6.6 |
| Chemical Bonding | 2 | 8 | 6.6 |
| Chemical And Ionic Equilibrium | 2 | 8 | 6.6 |
| Solid State And Surface Chemistry (Removed from 2024 syllabus) | 2 | 8 | 6.6 |
| Nuclear Chemistry And Environment | 2 | 8 | 6.6 |
| Mole Concept | 1 | 4 | 3.33 |
| Redox Reaction | 1 | 4 | 3.33 |
| Electrochemistry | 1 | 4 | 3.33 |
| Chemical Kinetics | 1 | 4 | 3.33 |
| Solution and Colligative Properties | 1 | 4 | 3.33 |
| General Organic Chemistry | 1 | 4 | 3.33 |
| Stereochemistry | 1 | 4 | 3.33 |
| Hydrocarbons | 1 | 4 | 3.33 |
| Alkyl Halides | 1 | 4 | 3.33 |
| Carboxylic Acid and their Derivatives | 1 | 4 | 3.33 |
| Carbohydrates, amino acid | 1 | 4 | 3.33 |
| Aromatic Compounds | 1 | 4 | 3.33 |
Important Topics for JEE Mains Chemistry
Chemistry in JEE Mains can be broadly divided into three sections: Physical Chemistry, Organic Chemistry, and Inorganic Chemistry. Each section has its own important topics that require different approaches.
| Chapter Name | Important Topics |
| Some basic concepts in chemistry | Empirical Formula And Molecular Formula |
| MOLE CONCEPT AND MOLAR MASS | |
| Stoichiometry, Stoichiometric Calculations And Limiting Reagent | |
| Reactions in Solutions | |
| Atomic Structure | Photoelectric effect |
| Line spectrum of hydrogen | |
| Radius, velocity and the energy of nth Bohr orbital | |
| Debroglie wavelength | |
| Heisenberg’s uncertainty principle | |
| Quantum Numbers | |
| Aufbau Principle, Pauli Exclusion Principle and Hund’s Rule of Maximum Multiplicity | |
| Chemical Thermodynamics | Path, State Function, Types Of Process |
| Reversible, Irreversible, Polytropic Process | |
| Isothermal Reversible And Isothermal Irreversible | |
| Heat Capacity | |
| Thermochemistry And Enthalpy For Chemical Reaction | |
| Enthalpy Of Combustion,Enthalpy Of Dissociation, Atomisation And Phase Change | |
| Lattice Enthalpy, Hydration Enthalpy And Enthalpy Of Solution | |
| Hess’s Law | |
| Calculation Of Changes In S For Different Process | |
| Gibbs Energy And Change In Gibbs Energy,Spontaneity Criteria With Gibbs Energy (G) | |
| Redox Reaction and Electrochemistry | Oxidation Number and Oxidation State |
| Types of Redox Reactions | |
| Balancing of Redox Reaction: Ion Electrode Method,Balancing of Disproportionation Redox Reaction: Ion Electrode Method,Balancing of Redox Reaction: Oxidation Number Method | |
| Quantitative Aspect of Electrolytic Cell: Faraday’s First Law,Faraday’s Second Law | |
| Galvanic Cells | |
| Nernst Equation,Nernst Equation for Full Cell,Equilibrium Constant Through Nernst Equation | |
| Molar and Equivalent Conductance,Molar Conductance at Infinite Dilution | |
| Kohlrausch’s Law | |
| General Principle and process of Isolation of metals | Froth Floatation Process |
| Leaching: Chemical Method | |
| Conversion of ore into oxide – Calcination and Roasting | |
| Electrolytic Refining,Vapour Phase Refining | |
| d – and f – BLOCK ELEMENTS | Screening Effect and Lanthanoid Contraction,Atomic Size/Radii,Ionisation Energy,Oxidation State,Magnetic Properties and Character |
| Formation of Coloured Ions | |
| Physical Properties of f-block,Properties of Actinoids | |
| Coordination Compounds | Addition Compounds or Molecular Compounds,Terminologies Related to Coordination Compounds,Types of Ligands – 1,Oxidation Number,Coordination Number,IUPAC Nomenclature of Coordination or Complex Compound |
| Magnetic Moment(On the Basis of VBT) | |
| Applications of CFT | |
| Stereoisomerism,Structural Isomerism – 1,Structural Isomerism – 2 | |
| Purification and Characterisation of Organic Compounds | Sublimation and Crystallisation,Distillation under reduced pressure and Steam distillation,Chromatography |
| Test for Halogens | |
| Duma’s Method | |
| Kjeldahl’s Method | |
| Carius Method (Halogen and Sulphur) | |
| Some Basic Principles of Organic Chemistry | Functional Group |
| IUPAC Nomenclature – 1 | |
| Carbocations | |
| Carbanions | |
| Alkyl Free Radicals | |
| Nucleophiles and Electrophiles | |
| Inductive Effect | |
| Mesomeric or Resonance Effect | |
| Organic Compounds containing Halogens | Nature of C-X bond and Physical Properties,Reaction with PCl5, PCl3, SOCl2 and HX |
| Strong and Weak bases,SN2 Reaction,SN1 Reaction,Nucleophilic Substitution | |
| Grignard Reagent – 1,Reduction by LiAlH4 and NaBH4 | |
| Acylation and Oxidation of Alcohols | |
| Reaction of Phenols with dil. HNO3,Reimer-Tiemann and Kolbe’s Schmidt Reactions | |
| Preparation of Aldehydes | |
| Nucleophilic Addition Reaction,Intramolecular Cannizzaro Reaction | |
| Methods of Preparation of Carboxylic Acids,Acidity in Carboxylic Acids | |
| Principles Related to Practical Chemistry | Preliminary Test with Dilute Sulphuric Acid (Systematic Analysis of Anions): |
| Analysis of Cations | |
| Chemical Bonding and Molecular Structure | Lewis Representation of Simple Molecules (Lewis Structure) |
| Limitations of The Octet Rule | |
| Bond Parameters: length, angle, energy, strength | |
| Fajan’s Rule and Covalent Character in Ionic Bond | |
| Pi (p-p) and Pi (p-d) bonding | |
| How to Find Hybridisation | |
| VSEPR (Valence Shell Electron Pair Repulsion) Theory | |
| Shapes of Molecules | |
| Dipole Moment | |
| Hydrogen Bonding | |
| Classification of Elements and Periodic table | Long form of Modern periodic table |
| Classification of Elements : s-block | |
| Atomic Radius of Elements,Variation of Atomic Radii and ionic radii | |
| Ionisation Enthalpy of Ionisation Potential | |
| Electron Gain Enthalpy or Electron Affinity | |
| Electronegativity | |
| Physical Properties of Elements,Chemical Properties of Elements | |
| Equilibrium | Types of Equilibrium Constant |
| Le Chatelier’s principle,Le Chatelier’s principle | |
| Bronsted Lowry and Lewis Acid-Base theory | |
| pH of Solutions: Strong Acids,pH of Solutions: Weak Acids,pH of solution/mixture | |
| pH of weak acid + strong acid | |
| Types of Buffers,Calculating pH of a Buffer Solution(acidic),Working of Acidic Buffer,Basic Buffers | |
| Solubility and Solubility Product | |
| Hydrogen | Preparation of Dihydrogen,Uses of Hydrogen |
| Water: Structure of Water and Ice, Heavy Water | |
| Hard and Soft Water | |
| Chemical Properties of H2O2 | |
| Preparation of Alkanes(Reduction of Alkenes/Alkynes) | |
| Physical Properties | |
| Hydrocarbons | Chemical Properties(Free Radical Reaction, Chlorination, Nitration and sulphonation),Chemical Properties (Combustion, Catalytic Oxidation, Isomerisation, Aromatisation and Pyrolysis) |
| Reduction of Alkynes to Alkenes | |
| Markovnikov and Anti-markovnikov Reaction | |
| Hydrohalogenation and Halogenation of Alkynes | |
| Solutions | Concentration Terms |
| Ideal Solution | |
| Elevation in Boiling Point | |
| Depression in Freezing Point | |
| Osmosis and Osmotic Pressure | |
| Isotonic, Hypertonic, Hypotonic Solution | |
| van’t Hoff factor(i) or Abnormal Colligative Property,Calculation of Extent of Dissociation in an Electrolytic Solution | |
| Chemical kinetics | Instantaneous Rate of Reaction,Factors Affecting Rate of Reaction,Factors Affecting Rate of Reaction(2) |
| Rate Law | |
| Important Points About Order of Reaction | |
| Zero Order Kinetics – Zero Order Reaction,Integrated Rate Law – Zero Order Reaction,Half Life and Life Time of Reaction,Graphs for Zero-Order Reaction | |
| First Order Reaction,Half Life of First Order Reaction,Graphs of First Order Kinetics | |
| nth Order Kinetics | |
| Molecularity of Reaction | |
| Exception(Arrhenius Theory),Effective Activation Energy | |
| p- Block Elements | Physical Properties of Group 13,Physical Properties of Group 13 – 1,Physical Properties of Group 13 – 2 |
| Chemical Properties of Group 13 | |
| Borax | |
| Group 14 (Carbon Family): Physical Properties – 2 | |
| Allotropic Form of Carbon(Diamond),Allotropic Form of Carbon(Graphite) | |
| Silicates – 1,Silicates – 2 | |
| SiO2 | |
| Silicones | |
| Group 15 – Physical and Chemical Properties | |
| Ammonia(NH3) | |
| Phosphine and Phosphorus Chloride | |
| Group 16: Oxygen Family – Physical Properties,Chemical Properties – 1,Chemical Properties – 2 | |
| Oxides | |
| Interhalogen Compounds | |
| General properties of Hydrides of Group 17 | |
| Chlorine(Cl2) | |
| Important Compounds of Xenon |
Chemistry Topic-wise Weightage Distribution for JEE Mains (2025)
Understanding the weightage distribution in Chemistry for the JEE Mains 2025 is crucial for optimizing study strategies. The subject is divided into three main areas: Physical Chemistry, Inorganic Chemistry, and Organic Chemistry, with each area having significant implications on the overall exam performance. Here’s the Chemistry Weightage in JEE Mains is distributed in the following streams:
- Physical and Inorganic Chemistry: Each of these sections holds substantial importance, with both contributing over 30% to the total weightage. In Physical Chemistry, crucial topics include thermodynamics, chemical kinetics, and equilibrium processes. In contrast, Inorganic Chemistry emphasizes understanding periodic trends, various reaction types, and the study of coordination compounds.
- Organic Chemistry: This section accounts for roughly 35% of the overall weightage and demands a thorough grasp of reaction mechanisms, the role of functional groups, and the principles of stereochemistry.
Approximate Weightage of Three Sections in JEE Mains Chemistry
- Physical Chemistry: ~35% weightage
- Organic Chemistry: ~35% weightage
- Inorganic Chemistry: ~30% weightage
Chemistry Study Tips Based on JEE Mains Weightage
Success in the JEE Mains 2025, particularly in the Chemistry section, relies heavily on strategic preparation and effective study habits. Given the varied topics and their respective weightages, it’s essential to tailor your study plan accordingly. Here are detailed strategies and tips to help you make the most of your preparation time for Chemistry.
1) Prioritize High-Weightage Topics
With Physical and Organic Chemistry each making up about 35% of the Chemistry portion and Inorganic Chemistry accounting for 30%, it’s crucial to prioritize these subjects based on their potential impact on your score. Focus on mastering the core concepts and frequent question types within these areas. For instance, in Physical Chemistry, ensure you are comfortable with numerical problems in Thermodynamics and the Mole Concept, which are often tested heavily.
2) Strategies for Physical Chemistry
Physical Chemistry combines understanding theoretical concepts with the ability to perform calculations accurately and quickly. Here are several strategies to excel in this segment:
- Master the Basics: Fundamental concepts in Physical Chemistry serve as the foundation for more complex topics. Make sure you understand the basic principles of Thermodynamics, Kinetics, and Equilibrium processes.
- Practice Calculations: Regular practice with numerical problems is vital. Use practice problems from previous JEE exams and reliable mock tests to enhance your calculation speed and accuracy.
- Use Visual Aids: Diagrams and flowcharts can help clarify complex processes and relationships, such as those found in Electrochemistry and Thermodynamics.
- Regular Revision: Set aside regular intervals for revising these topics to keep formulas and concepts fresh in your mind.
3) Focus Areas for Organic Chemistry
Organic Chemistry requires a good memory and an understanding of mechanisms to predict the outcomes of reactions. Here’s how you can tackle this section:
- Understand Reaction Mechanisms: Knowing why and how a chemical reaction occurs will help you predict products and identify reactants across various conditions.
- Create Reaction Maps: Visual aids that connect different reactions based on functional groups can be incredibly helpful in seeing the bigger picture.
- Practice Synthesis Problems: Work on problems that ask you to synthesize a compound from given starting materials, as these are common in exams.
- Group Study Sessions: Explaining concepts to peers and discussing various problems can deepen your understanding and expose you to different approaches.
4) Key Concepts in Inorganic Chemistry
Inorganic Chemistry often involves a lot of memorization. Here are strategies to effectively prepare:
- Focus on Periodic Trends and Group Studies: Understanding the periodic table thoroughly, including trends in electronegativity, ionization energy, and atomic radius, can help solve many problems quickly.
- Learn through Diagrams: Structures of inorganic compounds, such as hybridization and molecular geometry, are easier to recall using visual representations.
- Regular Testing: Regularly test yourself on key concepts and details like color, magnetic properties, and reactivity series, which are frequently asked about.
5) Time Management for Chemistry Preparation
Effective time management can significantly impact your Chemistry preparation:
- Allocate Time Wisely: Given the vast syllabus, allocate more time to topics with higher weightage but also ensure you cover all areas adequately.
- Balance Between Theory and Practice: While theory is important, JEE emphasizes application, so balance your study time between learning concepts and practicing problems.
- Scheduled Breaks: Long study hours without breaks are less productive. Include short breaks to improve focus and retention.
6) Daily Study Plan Based on Weightage
Creating and sticking to a daily study plan is crucial:
- Set Daily Goals: Break down your weekly targets into daily objectives to ensure consistent progress.
- Include Variety: Rotate between different types of chemistry topics each day to keep your study sessions engaging and comprehensive.
- Review Regularly: End each day with a quick review of what was studied to reinforce learning and identify any gaps.
7) Allocating Time for Different Sections
The division of study time should reflect the exam’s structure and your personal strengths and weaknesses:
- Theory Sessions: Dedicate specific times for deep theoretical studies, especially for complex topics where you feel less confident.
- Problem-Solving Blocks: Regular intervals for solving problems will help build speed and accuracy.
- Mock Tests: Regularly timed practice exams under exam conditions are essential to gauge your preparation level and adjust your strategies accordingly.
8) Importance of Mock Tests and Practice Papers
One of the most effective ways to prepare for JEE Main is by practicing regularly with mock tests and previous years’ papers. These help you get a feel for the actual exam environment, improve your time management skills, and enhance your problem-solving ability.
- Regular Mock Tests: Taking mock tests on a weekly basis allows you to assess your preparation and identify areas where you need improvement. Mock tests help you practice the types of questions you can expect in JEE Main. After every test, analyze your mistakes, and focus on improving those weak areas. A great resource for mock tests is the Phodu Club JEE Main Test Series, which offers a structured series of practice tests designed to mirror the actual JEE Main exam pattern. This series provides detailed solutions, helping you understand the correct approach to solve complex problems.
- Solve Previous Years’ Papers: In addition to mock tests, solving previous years’ JEE Main papers is equally important. By going through these papers, you get an understanding of the exam pattern, the most frequently asked questions, and the level of difficulty. It will also help you gauge the time required to solve each section, which is crucial for optimizing your exam strategy.
Conclusion
As you prepare for the JEE Mains 2025, understanding the weightage and distribution of topics within the Chemistry section is crucial. This insight allows you to strategically allocate your study time, focusing more on high-yield areas like Physical Chemistry’s thermodynamics and Organic Chemistry’s reaction mechanisms. Remember, success in JEE Mains requires both deep knowledge and efficient problem-solving skills. Dedicate sufficient time to mastering key concepts and practicing various problem types. Balance your preparation across Physical, Organic, and Inorganic Chemistry to ensure comprehensive coverage. By focusing your efforts on these strategic areas and maintaining a disciplined study schedule, you enhance your chances of scoring well and achieving your goal of entering a top engineering college. Keep pushing forward, stay curious, and let your passion for learning drive you towards excellence. Good luck!
