National Test Agency (NTA) conducts JEE Main in two sessions: in January and in April. JEE Main 2020 registration for the January session started on September 3, 2019, and closed on October 10, 2019; registration for the April session will start from February 7, 2020, and close on March 7, 2020. The exams for the January session will be conducted from January 6 to January 11, 2020; the exams for the April session will be from April 3 to 9, 2020. Aspiring candidates can appear for both or either of the sessions. It is the most important exam for engineering aspirants and is the biggest entrance test for enrollment in undergraduate engineering courses. It is also one of the most important entrance exams for B.Arch and B.Plan aspirants.
JEE Main 2020 application form has been closed for the January session, and the exams are close. To crack the JEE Main, only hard work is not sufficient; you need to work smartly, too. For this, you must know the chapters and topics that are most important for the exam. You need to prioritize your studies accordingly. This will help you improve your score in the exam. First, you must prepare the entire syllabus, and then you must give additional focus to the important topics that hold more weightage in the JEE Main.
Important Topics for JEE Main 2020 for Physics:
In Physics, “Modern Physics” holds the maximum weightage (14%), and the average number of questions expected from the chapter in JEE Main is 5. “Ray Optics and Wave Optics” holds 10% weightage; so does Heat and Thermodynamics. Here is a table containing the important topics and chapters for Physics and the weightage assigned to each of them.
| Physics: Chapters and Topics | Average Number of Questions | Weightage in Percentage |
| Modern Physics | 5 | 14% |
| Ray Optics and Wave Optics | 3 | 10% |
| Heat and Thermodynamics | 3 | 10% |
| Electromagnetic Induction, Alternating Current, and Electromagnetic Waves and Communication | 3 | 8% |
| Electrostatics | 3 | 8% |
| Gravitation and Rotational Mechanics | 3 | 7% |
| Current Electricity | 3 | 7% |
| Magnetism and Magnetic Effects of Current | 2 | 6% |
| Properties of Matter | 2 | 5% |
| Kinematics | 2 | 5% |
| Mechanical Waves and Sound | 2 | 4% |
| Units, Dimensions, Errors, Experiments | 2 | 4% |
| System of Particles | 2 | 4% |
| SHM, Oscillations | 1 | 3% |
| Work, Energy, and Power | 1 | 3% |
| Newton’s Laws of Motion and Friction | 1 | 2% |
Important Topics for JEE Main 2020 for Chemistry:
In Chemistry, “Inorganic Chemistry—I” holds the maximum weightage (25%). Next comes “Organic Chemistry—II” with 22% weightage. “Physical Chemistry—I” held a weightage of 20% and “Physical Chemistry—II” held a weightage of 17% in the previous year’s paper. Here is a table containing the important topics and chapters for Chemistry and the weightage assigned to each of them.
| Chemistry: Chapters and Topics | Average Number of Questions | Weightage in Percentage |
| Inorganic Chemistry—I | 10 | 25% |
| Chemical Bonding | 3 | 8% |
| Complete P-Block | 2 | 7% |
| Periodic Table | 1 | 3% |
| Complete S-Block | 1 | 3% |
| Metallurgy | 1 | 2% |
| Environmental Chemistry | 1 | 2% |
| Hydrogen and its Compounds | 1 | 1% |
| Organic Chemistry—II | 11 | 22% |
| Alkyl Halide, Alcohol, & Ether | 2 | 7% |
| Practical Organic Chemistry | 2 | 4% |
| Polymer | 1 | 3% |
| Aromatic Hydrocarbon | 1 | 2% |
| Carboxylic Acids and Their Derivatives | 1 | 2% |
| Biomolecules | 1 | 2% |
| Aldehyde and Ketones | 1 | 1% |
| Isomerism | 1 | 1% |
| Carbonyl Compounds | 1 | 1% |
| Physical Chemistry—I | 9 | 20% |
| Mole Concept | 2 | 5% |
| Ionic Equilibrium | 2 | 5% |
| Thermodynamics & Thermochemistry | 2 | 4% |
| Atomic Structure | 1 | 3% |
| Chemical Equilibrium | 1 | 2% |
| Gaseous State | 1 | 1% |
| Physical Chemistry—II | 7 | 17% |
| Electrochemistry | 2 | 5% |
| Surface Chemistry | 2 | 4% |
| Chemical Kinetics | 1 | 3% |
| Solution and Colligative Properties | 1 | 3% |
| Solid State | 1 | 3% |
| Organic Chemistry—I | 3 | 8% |
| GOC | 2 | 6% |
| Hydrocarbon | 1 | 2% |
| Inorganic Chemistry—II | 5 | 8% |
| Coordination Compounds | 2 | 4% |
| Qualitative Analysis | 1 | 2% |
| F-Block | 1 | 1% |
| Complete D-Block | 1 | 1% |
Important Topics for JEE Main 2020 for Mathematics:
In Mathematics, “Differential Calculus” holds the maximum weightage (18%), and the average number of questions from this topic is 7. “Statistics & Probability” holds 15% weightage and “Coordinate Geometry” holds 14% weightage. Next comes “Integral Calculus” with a weightage of 13%. Here is a table containing the important topics and chapters for Mathematics and the weightage assigned to each of them.
| Mathematics: Topics and Chapters | Average Number of Questions | Weightage in Percentage |
| Differential Calculus | 7 | 18% |
| Statistics & Probability | 6 | 15% |
| Coordinate Geometry | 6 | 14% |
| Integral Calculus | 4 | 13% |
| Vector & 3d | 4 | 10% |
| Matrices & Determinants | 3 | 7% |
| 3-D | 3 | 7% |
| Sequence & Series | 2 | 6% |
| Trigonometry | 4 | 6% |
| Probability | 2 | 5% |
| Straight Line | 2 | 5% |
| Application of Derivatives | 2 | 5% |
| Limit, Continuity, & Differentiability | 2 | 5% |
| Statistics | 2 | 4% |
| Quadratic Equations | 2 | 4% |
| Complex Number | 1 | 3% |
| Binomial Theorem | 1 | 3% |
| Mathematical Reasoning | 1 | 3% |
| Permutation & Combination | 1 | 3% |
| Method of Differentiation | 1 | 3% |
| Function | 1 | 3% |
| Tangent & Normal | 1 | 3% |
| Ellipse | 1 | 3% |
| Vector | 1 | 3% |
| Indefinite Integration | 1 | 3% |
| Definite Integration | 1 | 3% |
| Differential Equation | 1 | 3% |
| Area Under the Curve | 1 | 3% |
| Trigonometric Ratio Identities | 1 | 2% |
| Trigonometric Equation | 1 | 2% |
| Hyperbola | 1 | 2% |
| Inverse Trigonometric Function | 1 | 1% |
| Height & Distance | 1 | 1% |
| Sets & Relation | 1 | 1% |
| Mathematical Induction | 0 | 0% |
