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JEE Main February 2021 for B.Tech (Paper 1) has been conducted on February 24. Check the detailed exam analysis of JEE Main 24th February Shift 1 exam along with memory-based questions, solutions and answer key. The overall difficulty level of the paper was moderate.
Day 2 Shift 1 of JEE Main 2021 (Phase 1) has been conducted on February 24 for B.Tech (Paper 1). As per the new exam pattern of JEE Main 2021 , the question paper has a total number of 90 questions. Out of 10 NAT questions, the candidates had to answer any five in each section, and there is no negative marking for the same. The three sections in the exam are Mathematics, Physics and Chemistry. You can check the JEE Main 2021 exam analysis for the exam scheduled on February 24 (Shift 1) along with the memory-based questions and answer key. The official JEE Main 2021 answer key will be released within two days after the exam.
| JEE Main 2021 Paper 1 (B.Tech) Answer Key |
|---|
JEE Main 24th Feb 2021 Shift 1 Analysis Vidoe
JEE Main 24 th Feb 2021 Shift 1 Exam Analysis
The exam analysis of JEE Main 24 th Feb 2021 Shift 1 has been updated. The paper was not very difficult, and it is similar in the lines of previous years' question papers. There were no surprising elements in the paper. The Chemistry was relatively easy, as most questions from NCERT books. The choice given for Numerical questions turned beneficial for students. From Chemistry Numerical, Physical Chemistry had more questions. From Polymers, there was a Match the Following type question. From Biomolecules, there was a question related to Alpha structure. Application-based questions were more rather than direct questions. If you had appeared for the exam, you can share your feedback and questions on Whats App Number 9059528251 or E-Mail ID sakunth.kumar@collegedekho.com
Aspect | Analysis |
|---|---|
Overall Difficulty Level of the Exam | Moderate |
Difficulty Level of Mathematics | Easy to Moderate (Calculation-Based Questions) |
Difficulty Level of Physics | Easy to Moderate |
Difficulty Level of Chemistry | Easy |
Topics with More Weightage in Mathematics |
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Topics with More Weightage in Physics |
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Topics with More Weightage in Chemistry |
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Difficulty Level of Numerical Questions | Lengthy |
Expected Number of Good Attempts | 80 (out of 90) - Many Students Attempted Choice Also |
Physics Chapter Wise Weightage of JEE Main 24th Feb Shift 1
The chapter weightage of Physics in JEE Main 24th Feb Shift 1 exam is as follows -
| Name of the Chapter | Weightage |
|---|---|
| Electrodynamics | 17% |
| Heat & Thermodynamics | 17% |
| Mechanics | 37% |
| Modern Physics | 20% |
| Optics | 7% |
| SHM & Waves | 3% |
Physics Topic Wise Weightage of JEE Main 24th Feb Shift 1
The topic-wise weightage of JEE Main 24th Feb 2021 Shift 1 is as follows -
| Name of the Topic | Total No. of Questions |
|---|---|
| Capacitance | 1 |
| Current Electricity | 2 |
| Electrostatics | 1 |
| Alternating Current | 1 |
| Heat Transfer | 1 |
| KGT & Thermodynamics | 2 |
| Calorimetry & Thermal Expansion | 2 |
| Rigid Body Dynamics | 1 |
| Centre of Mass | 1 |
| Rectilinear Motion & Vectors | 1 |
| Gravitation | 3 |
| Unit & Dimension | 2 |
| Friction | 2 |
| Surface Tension | 1 |
| Semiconductors | 2 |
| Electromagnetic Waves & Communication | 1 |
| Modern Physics | 3 |
| Geometrical Optics & Physical Optics | 1 |
| Wave Optics | 1 |
| SHM | 1 |
Chemistry Chapter Wise Weightage of JEE Main 24th Feb Shift 1
The chapter-wise weightage of Chemistry in JEE Main 24th Feb Shift 1 is as follows -
| Name of the Chapter | Weightage |
|---|---|
| Inorganic Chemistry-I | 17% |
| Inorganic Chemistry-II | 13% |
| Organic Chemistry-2 | 27% |
| Physical Chemistry 1 | 20% |
| Physical Chemistry 2 | 17% |
| Organic Chemistry-1 | 7% |
Chemistry Topic Wise Weightage of JEE Main 24th Feb Shift 1
The topic-wise weightage of JEE Main 24th Feb Shift 1 Chemistry is as follows -
| Name of the Topic | Total No. of Questions |
|---|---|
| Chemical Bonding | 5 |
| Environmental Chemistry | 1 |
| p-Block (13-14 GRP) | 1 |
| Periodic Table & Periodicity in Properties | 1 |
| s-Block | 1 |
| Coordination Compounds | 1 |
| Metallurgy | 3 |
| Biomolecules | 1 |
| Polymers | 1 |
| Aromatic Compounds | 3 |
| Alkyl Halide, Alcohol & Ether (Reaction Mechanism) | 1 |
| Grignard Reagent, Reduction, Oxidation & Hydrolysis | 2 |
| Chemical Equilibrium | 1 |
| Mole Concept | 3 |
| Atomic Structure & Nuclear Chemistry | 1 |
| Thermodynamics & Thermochemistry | 1 |
| Chemical Kinetics | 1 |
| Electrochemistry | 1 |
| Solid State | 1 |
| Surface Chemistry | 1 |
| Solution & Colligative Properties | 1 |
| Hydrocarbon | 2 |
Mathematics Chapter Wise Weightage of JEE Main 24th Feb Shift 1
The chapter-wise weightage of Mathematics in JEE Main 24th Feb Shift 1 is as follows -
| Name of the Chapter | Weightage |
|---|---|
| Binomial Theorem | 3% |
| Coordinate Geometry | 10% |
| Differential Calculus | 20% |
| Integral Calculus | 20% |
| Permutation & Combination | 3% |
| Probability | 3% |
| Sequence & Series | 3% |
| Vector & 3D | 7% |
| Mathematical Reasoning | 3% |
| Quadratic Equation | 7% |
| Trigonometry | 3% |
| Matrix & Determinants | 3% |
Mathematics Topic Wise Weightage of JEE Main 24th Feb Shift 1
The topic-wise weightage of JEE Main 24th Feb Shift 1 Mathematics is as follows -
| Name of the Topic | Total No. of Questions |
|---|---|
| Binomial Theorem | 1 |
| Parabola | 1 |
| Straight Line | 1 |
| Circle | 1 |
| Limit, Continuity, Differentiability | 2 |
| Functions | 1 |
| Tangent & Normal | 1 |
| Maxima & Minima | 1 |
| Application of Derivatives | 1 |
| Definite Integration | 2 |
| Differential Equation | 2 |
| Indefinite Integration | 1 |
| Area under Curve | 1 |
| Permutation & Combination | 1 |
| Probability | 1 |
| Sequence & Series | 1 |
| Vector | 1 |
| Three Dimensional Geometry | 1 |
| Mathematical Reasoning | 1 |
| Quadratic Equation | 2 |
| Height & Distance | 1 |
| Matrices & Determinants | 1 |
Section Wise Difficulty Level of JEE Main 24th Feb Shift 1
The section-wise difficulty level of JEE Main 24th Feb 2021 is as follows -
| Name of the Subject | No. of Easy Questions | Average | Difficult |
|---|---|---|---|
| Physics | 14 | 10 | 6 |
| Chemistry | 16 | 11 | 3 |
| Mathematics | 15 | 09 | 6 |
JEE Main 2021 24 th Feb 2021 Shift 1 Question Paper & Answer Key
We have updated the memory-based questions shared by students along with the answers here. You can also send your questions on Whats App Number 9059528251 .
- JEE Main 2021 Question Papers (PDF) - Click on the Link for More Questions
| Question | Question |
|---|---|
|
An astronaut has left the international space station to test a new space scooter. His partner measures the fall velocity changes which take place in 10s interval. Find the magnitude and direction of average acceleration at the beginning of 10 sec interval, the astronaut is moving towards the x-axis in 10m/sec and at the end is 10 sec. He is moving towards the -ve axis at 5m/sec.
Ans. 1.5 m/sex, -ve x-axis | What will be the energy if you increase lambda |
| Two capacitors are given. Find the series and parallel resistant and their ratio. | Find the work done by the cylcin process. |
| Calculate the ionization energy of all third period elements. | If there is degradation of vegetation, then what effect is caused in the environment from gas released? |
| A P and V graph was given, find the work done. | Calculate the ionization energy of all third period elements. |
|
The non-existence of PbI4 is due to ________
Ans. Small size of Pb ion and large size of I ion. Highly reduced power of I ion. | Block m has amplitude A. If another mass of m is added what will be the new amplitude? |
|
A body cools down from 100C to 90C in 20 minutes. It will cool down from 110C to 100C in _____
Ans. Less than 20 minute |
An ore of Tin containing FeCrO
4
is concentrated by _____
Ans . Magnetic separator |
| A cube is given and it has -q charge in one corner and +q charges in all the remaining 7 corners. Find the electric field inside the cube. | Compare the Ionisation Energy of SC, RI, V, Cr, Mn… |
|
What is the composition of gunmetal?
Ans. 88 percent copper, 10 percent tin, and 2 percent zinc |
The ratio of effusion does not depend on _____
Ans. Size of molecule |
| Youngs double slit experiment . Relation between slit width and wavelength | There was a question from communication |
| The relation between youngs modulus bulk modulus and shear modulus( mcq) | Ration between time period of two satellite( mcq) |
| There was a question from current electricitu regarding the potential differences between two points | Relation between f and r of convex mirror |
| A velocity versus time graph was given. Had to choose the option showing acceleration versus time. | An ordinary dice. The probability of odd numbers coming twice is equal to probability of even numbers coming 3 times. Find probability of getting odd numbers 3 times |
| Two towers. One is 3 times the height of the other. Distance between them 150 m. From the mid point of the distance between 2 towers, angle of elevation calculated for both the roofs. The angles are complementary. Find height of short building. | - |
JEE Main 2021 response sheet will be available within 2 days after the exam. On the other hand, the Phase 1 results of JEE Main 2021 will be out in the first week of March.
JEE Main February 2021 Exam Analysis (All Shifts)
Also Read
| JEE Main March 2021 Application Form | JEE Main March 2021 Admit Card |
| JEE Main 2021 Cutoff | JEE Main Feb 2021 Physics Question Paper |
Total Registrations for JEE Main February 2021 Paper 1
The total number of registrations for JEE Main February 2021 Paper 1 is as follows -
| Category | Male | Female | Transgender |
|---|---|---|---|
| General | 1,96,673 | 90,522 | 1 |
| Gen-EWS | 45,372 | 18,028 | 0 |
| OBC- NCL (Central List) | 1,54,872 | 67,181 | 1 |
| SC | 41,626 | 15,948 | 0 |
| ST | 16,309 | 6,092 | 2 |
| PwD | 1,448 | 330 | 0 |
| Total | 4,54,852 | 1,97,771 | 4 |
Stay tuned to CollegeDekho for the latest JEE Main 2021 news & updates .
