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JEE Main 2021 B.E/B.Tech Paper Pattern (Revised): Marking Scheme, Sample Questions, Tips, Career Scope

Admit Card: 28 May `21
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Karishma Khatri

Exams Prep. Master | Updated On - Apr 29, 2021

Considering the wide range of disciplines to choose from later, a clear majority of the test takers sit for the B.E/ B.Tech paper of JEE Main. B.E/ B. Tech paper tests students' knowledge in three sections i.e. Physics, Chemistry and Mathematics.

JEE Main 2021 B.E/ B.Tech Exam Pattern has gone major changes with the reduction in CBSE syllabus. There has been an increase in the number of questions, in each section. There will be 30 questions each and candidates will need to answer 25 questions from each of those sections. There will be a total of 10 NAT questions (which was 5 last year) and students will be provided with a choice to answer any five questions in each section. Check Changes in JEE Main B.E/B.Tech Paper Pattern

Latest Updates

  • April 20, 2021: JEE Main Mathematics Question Papers slot-wise for previous years available. Download Here
  • April 18, 2021: JEE Main April Session Postponed, new dates yet to be released by NTA. Read More

The paper is administered in CBT mode, as a basic condition, candidates appearing/have passed class XII can sit for the paper. Numerical value questions were introduced to the paper pattern of B.E/B.Tech paper in the previous session. The total questions were reduced from 90 to 75 and the same pattern is to be continued in JEE Main 2021.

B.E/B.Tech Exam Pattern

JEE Main 2021 B.E/B.Tech Exam Pattern

Parameters 2021 2020
Exam Mode Computer-based test mode
Exam Duration 3 hours 

Physics; Chemistry; Mathematics

Type of Questions MCQs + Numerical Answer Type (NAT) questions
Languages (Revised) English, Hindi, Urdu (All Center Cities)
Regional Languages 
Hindi, English, and Gujarati (only for centers in Gujarat, Daman and Diu, and Dadra and Nagar Haveli)
Total Number of Questions Asked (Revised)

30 Questions (20 MCQs + 10 NAT)

25 Questions (20 MCQs + 5 NAT)
Questions to be Answered (Revised) 25 Questions (20 MCQs + 5 NAT) 25 Questions (20 MCQs + 5 NAT)
Marking Scheme For MCQs: +4 for each correct answer and -1 for any wrong answer;
For NAT: +4 for each correct answer and 0 for any wrong answer
Maximum Marks 300

Must Read at Collegedunia

Why is the knowledge of the exam paper pattern important?

  • The knowledge of B.E/B. Tech exam pattern of JEE Main 2021 is very crucial. You will be able to understand the weightage of each section and allot time accordingly.
  • The Physics, Chemistry, and Mathematics sections students have to answer 25 questions each (20 MCQs and 5 NAT questions). Therefore, all three sections have an equal weightage and you will be required to dedicate an equal amount of time for each of them.
  • Each subject has certain important chapters which you will have to focus on. Targeted study planning can be done according to the nature of the questions (MCQs and NAT).
  • The paper pattern provides information regarding negative marking for incorrect MCQs. This knowledge will prevent you from making random guesses while attempting the paper.
  • Familiarizing yourself with the paper pattern will also aid in attempting mock tests within the duration of 3 hours. Doing so will provide an insight into your capacity for time management in the actual examination.

Why does JEE Main B.E/ B. Tech Get the Most Applications Out of All the Three Papers?

  • JEE Main B.E/B. Tech gets the most applications out of all three papers because it provides admissions to the top engineering colleges in India. 
  • Mainstream engineering is a choice of many students, leading to more applications as compared to the fewer numbers for architecture (B.Arch) and planning (B.Plan) courses.
  • The number of best-ranking institutes taking in students through JEE Main Paper 1 is higher than those institutes taking students through Papers 2 and 3.
  • On clearing JEE Main B.E/ B. Tech Paper, students will also have the opportunity to answer JEE Advanced for admission into IITs.
  • Students have the option of taking JEE Main B.E/ B. Tech Paper in two sessions for better marks.

All these factors contribute to the high number of applications for the JEE Main B.E/B.Tech paper.

Changes Made in Exam Pattern

Changes Introduced in JEE Main 2021 B.E/ B. Tech Paper Pattern by NTA

JEE Main B.E/B. Tech paper will be conducted in the Computer-Based Test (CBT) mode. There will be three sections in the paper - Physics, Chemistry, and Mathematics. 

  • There will be 10 Numerical Answer Type (NAT) questions for all three sections, however, students will have a choice to answer any five from each each section.
  • Every section will have 20 MCQs and all questions have to be answered. 
  • Each MCQ will be awarded 4 marks if correct. For an incorrect answer, 1 mark will be deducted.
  • Each NAT question will be awarded 4 marks if correct. 0 marks will be deducted for an incorrect answer. 
  • The total time duration of the paper will be 3 hours. 
  • The maximum possible marks will be 300. 
Section Total Number of Questions Questions to be Answered Maximum Marks Type of Questions
Mathematics 30 (20 + 10) 25 (20 + 5) 100 20 Objective Type (MCQs) and 10 Numerical Answer Type (NAT) questions
Physics 30 (20 + 10) 25 (20 + 5) 100 20 Objective Type (MCQs) and 10 Numerical Answer Type (NAT) questions
Chemistry 30 (20 + 10) 25 (20 + 5) 100 20 Objective Type (MCQs) and 10 Numerical Answer Type (NAT) questions
Total 90 75 300 -

Marking Scheme of JEE Main B.E/ B. Tech Paper

Type of Questions For Each Correct Answer For Each Incorrect Answer For Each Unanswered Question
For MCQs +4  -1 0
For NAT +4 0 0

Paper Attempting Tricks for JEE Main 2021 B.E/ B. Tech Paper
Trick 1 - Attempt the Chemistry section first, followed by Mathematics, and finally Physics. Chemistry is generally the easiest section and has more questions based on facts. The other two sections have more problem-solving questions. Mathematics is of moderate difficulty while Physics tends to be the toughest.

Also Read Maximize Your JEE Main Score by Attempting Questions the Right Way

Trick 2 - You could attempt all the NAT questions in the beginning because they do not have any negative marking. 

Trick 3 - Find answers in terms of variables. This will eliminate the possibility of calculator mistakes and makes dimension checking very easy. 

Trick 4 - Try to guess the order and dimension of each answer. This will help while rechecking your paper. 

Trick 5 - Do not dedicate more than 5 minutes to one question. 

Trick 6 - While attempting MCQs, reject the incorrect answers and then check the correct answer. 

Trick 7 - Use the substitution technique for Physics and Mathematics. When unknowns such as x,y, or z are given in the question, consider them like 1,0, or any other appropriate digit relevant to the question. However, take care not to try this technique unnecessarily. 

Trick 8 - If you have a quadratic equation question in the Mathematics section, first find the sum and product of the roots. Several questions can be solved with these two values. 

Trick 9 - Check and recheck your calculations. 

Trick 10 - If you are unsure about a question, move onto the next. This will help in time management. You can come back to the question at the end of the paper. 

Trick 11 - The most important trick is to stay confident and positive. 

Sample Questions

Sample questions for JEE Main 2021 B.E/ B. Tech

  1. α is the relative error while determining the surface area of a sphere. What is the relative error in the determination of its volume? 
    1. 3/2 α
    2. 2/3 α
    3. 5/2 α
    4. α
  2. An automobile travels at 40 km/h. It can be stopped at a distance of 40m by applying brakes. If this automobile travels at 80 km/h, without skidding, what is the minimum stopping distance, in meters?
    1. 75m
    2. 100m
    3. 150m
    4. 160m
  3. A Carnot’s engine can work like a refrigerator between 250K and 300K. It obtains 500cal of heat from a reservoir at a lower temperature. What is the amount of work done in each cycle to make the refrigerator function?
    1. 420J
    2. 772J
    3. 2100J
    4. 2520J
  4. A sample of NaClO3 gets converted to NaCl by heat with a loss of 0.16g of oxygen. The residue becomes dissolved in water and gets precipitated as AgCl. What will be the mass of AgCl (in g) obtained? (Given: molar mass of AgCl=143.5 g mol−1)
    1. 0.35
    2. 0.41
    3. 0.48
    4. 0.54
  5. N2O5 gets decomposed to NO2 and O2. It follows first-order kinetics. After a duration of 50 minutes, the pressure inside the vessel rises from 50 mmHg to 87.5 mmHg. What will be the pressure of the gaseous mixture after 100 minutes at constant temperature?
    1. 175.0 mmHg
    2. 116.25 mmHg
    3. 136.25 mmHg
    4. 106.25 mmHg
  6. The ejection of the photoelectron from metal in the photoelectric effect experiment can be halted by applying 0.5 V when a radiation of 250 nm is used. What is the work function of the metal?
    1. 4eV
    2. 4.5 eV
    3. 5eV
    4. 5.5 eV
  7. If S is the set of all real values for which the system of linear equations - 




    has a unique solution. What is S?

    1. an empty set
    2. equal to {0}
    3. equal to R
    4. equal to R−{0}
  8. n-digit numbers are formed by using three digits 2, 5, and 7. What is the smallest value of n for which 900 such distinct numbers can be formed?
    1. 6
    2. 7
    3. 8
    4. 9
  9. Suppose b is the first term of an infinite G.P. with a sum of five, then b lies in the interval -
    1. (−∞, −10)
    2. (−10, 0)
    3. (0, 10)
    4. [10, ∞)

Important Topics

JEE Main 2021 B.E/ B. Tech Paper - Important Topics

B.E/ B. Tech Important Topics for Physics

Topic Name
Heat & Thermodynamics Wave Optics Electrostatics
Ray Optics Photoelectric Effect Current Electricity & Capacitors
Electromagnetic Waves Oscillations Properties of Matter
Semiconductors Electromagnetic Induction & Alternating Current Magnetic Effects of Current & Magnetism
Error & Instrument Analysis Rotation Bohr’s Atomic Model
Gravitation Kinematics Waves & Sound

Must Read

B.E/ B. Tech Important Topics for Chemistry

Topic Name
Atomic Structure d-Block Elements p-Block Elements
Gaseous & Liquid State Coordination Compound General Organic Chemistry
Electrochemistry Alkyl Halides Isomerism
Chemical Kinetics Aromatic Compounds Aldehydes and Ketones
Nuclear & Surface Chemistry Thermodynamics Carboxylic Acids & Its Derivatives
Chemical Bonding - -

B.E/ B. Tech Important Topics for Mathematics

Topic Name 
3 Dimensional Geometry Circle Application of Derivatives
Vectors Probability Distribution (Binomial + Mean & Variance) Conic Sections
Determinant & Matrices Definite Integral & Area Under the Curve Complex Number
Sequence & Series Limits, Continuity & Differentiability Quadratic Equation
Straight Line Functions Binomial Theorem & M. I.

Career Scope

JEE Main B.E/ B. Tech Paper Career Scope

Getting good scores in the JEE Main B.E/B. Tech paper will grant you admission into the top engineering colleges of the country. There are 23 IITs and 31 NITs in India. You can even take up JEE Advanced and get a seat in the most elite IITs. B.E/B. Tech is a 4-year full-time undergraduate course. The many disciplines that you can choose from for your B.E/B. Tech course are - 

  • Computer Science and Engineering
  • Information Technology
  • Electronics and Communication Engineering
  • Electrical Engineering
  • Mechanical Engineering
  • Civil Engineering
  • Petroleum Engineering
  • Chemical Engineering
  • Aerospace Engineering
  • Industrial Engineering
  • Aeronautical Engineering

What after B.E/B.Tech? 

You have quite a few appealing options after B.E/B.Tech. 

  1. Pursue M.E/M. Tech where you can choose a specialization. 
  2. Get a Ph.D. in a related discipline. 
  3. Take up an MBA.
  4. Take up an engineering job. 
  5. Become an entrepreneur. 

Job Opportunities for B.E/B.Tech 

There are several job opportunities in both technical and non technical fields that you can pursue after graduating from B.E/B.Tech courses. 

Campus Placements

Every engineering college has a dedicated placement cell that works to get engineering graduates placed in well-established organizations. Generally, after B.E/B. Tech, students get hired for entry-level job roles by private companies in technical fields. If you take up jobs through campus placements, you can avail of relevant experience in the field of engineering before pursuing further studies.

PSU Jobs

B.E/B. Tech students can also apply for technical jobs in Public Sector Undertakings (PSUs) through the Graduate Aptitude Test for Engineering (GATE). Several PSUs hire B.E/B. Tech students for entry-level jobs according to their GATE score. Some PSUs like CII, ISRO, and BARC conduct their own examinations to screen students for entry-level job positions.

Some of the top PSUs according to your specialization are - 

Civil Mechanical Electrical Electronics Computer Science

Jobs through Engineering Services Exam

The Engineering Services Exam is a national level screening test administered by the Union Public Service Commission (UPSC). This exam is a great choice for B.E/B. Tech students who wish to work for government jobs in varied sectors such as Defence, PWD, Railways, to name a few. This exam also has a non-technical component and a three-stage screening process, making it a very tough exam to crack.

Private Companies

For those B.E/B. Tech graduates who do not want to take up campus placements, they can apply to different private companies for a job. Students could take up employability tests like AMCAT and eLitmus to prove their technical prowess and enhance their chances of being chosen for a job. 

Top recruiters - 

  1. Accenture
  2. TCS
  3. Infosys
  4. Cognizant
  5. Tata Motors
  6. Bajaj

Expected Cut-off

JEE Main B.E/B.Tech Expected Cut-off Rank for Top Colleges

NIT Trichy OR 2060 5325 4154 5708
CR 5317 8011 12970 10353
NIT Rourkela OR 2253 8571 11662 4084
CR 9420 12009 20304 19168
NIT Surathkal OR 960 3378 6315 3456
CR 3181 5608 11788 6801
NIT Warangal OR 978 2919 4340 5270
CR 2341 2919 10209 8152
NIT Calicut OR 2201 8023 10629 9703
CR 10222 14769 20480 18966
NIT Kurukshetra OR 2268 8320 11195 9454
CR 6170 12067 18115 16273
NIT Durgapur OR 5611 12509 14511 13595
CR 12095 16098 22753 19325

Previous Year Paper Analysis

Previous Year JEE Main B.E/ B. Tech Paper Analysis 

Having an understanding of how the previous years exam, JEE Main 2020 was conducted will give a better idea about what to expect for this year.

January Session

Shifts Exam Start Exam End
Shift I 09:30 AM 12:30 PM
Shift II 02:30 PM 05:30 PM

The detailed JEE Main Paper Analysis for B.E/ B. Tech paper is given below 

JEE Main B.E/ B. Tech Paper January 7, 2020 Shift I 

The morning shift on January 7 was conducted between 9:30 PM to 12:30 PM. The B.E/ B.Tech paper was divided into three sections - Physics, Chemistry, and Mathematics. 

  • The Chemistry section was considered to be the easiest section out of all the 3 sections. A few candidates found Mathematics to be the toughest. Some others found Physics to be the toughest.
  • The paper was seen to be easier than the JEE Main question papers of 2019.
  • The Numerical Answer Type (NAT) questions were moderately difficult.
  • A few questions in Mathematics were highly difficult and the section as a whole was considered time-consuming.
  • Some of the most asked topics in Mathematics were parabola, quadratic equations, probability, circles, permutation, and combination. Questions from calculus were very high in difficulty level. 
  • Many questions in Chemistry were based on quantum numbers and chemical bonds. 
  • Wave optics, resistance, projectile, magnetic field, and modern physics were the most asked topics in Physics.

JEE Main B.E/ B. Tech Paper January 7, 2020 Shift II

The afternoon shift timings were 2.30 PM to 5.30 PM. Once again, B.E/B. Tech paper was identified to be easier compared to JEE Main question papers of the previous year. 

  • In conceptual terms, physics was defined as the hardest section.
  • Mathematics was also high in terms of the level of difficulty and time-consuming at the same time.
  • As most of the questions were from NCERT in Chemistry, it was scaled easily by the candidates in terms of difficulty level.
  • The syllabus of Classes 11 and 12 was spread throughout the paper in a balanced manner.
  • Nevertheless, there were more questions in the mathematics section from the syllabus of Class 12.
  • Numeric value-based problems were difficult in physics and simple in chemistry. But attempting these questions in mathematics got difficult as the section was long and thus, time-consuming. 
  • Mathematics had 3-4 integration questions and they were all easy to attempt. Probability problems were also simple in maths. 
  • In this year's paper, the weightage of organic chemistry was more compared with last year whereas inorganic chemistry had only 2-3 questions. 
  • A few questions emerged from Newton 's law of cooling.

JEE Main B.E/ B. Tech Paper January 8, 2020 Shift I 

The question paper was considered to be of a moderate difficulty level with Mathematics being the most time-consuming section.

  • The numerical value-based questions from Mathematics were found to be easy by the candidates. However, many candidates suggest that test takers must save 90 minutes for the Mathematics section because attempting the desired number of questions will be challenging.
  • The question paper covered the syllabus of Classes 11 and 12.
  • For Physics, the Class 11 syllabus seemed to have more weightage. 
  • The Chemistry section which is usually easy in terms of difficulty level was tough this time. Candidates were not expecting a lot of questions from inorganic chemistry. However, there was a fair amount of questions from the topic. 
  • One question from Chemistry came from environmental chemistry regarding greenhouse gases. There were about 2-3 questions from ionization enthalpy.
  • The Mathematics section had questions from Matrix and Determinants, Arithmetic Progression, Vector and 3D, Parabola, Calculus, and Conic sections. 

JEE Main B.E/ B. Tech Paper January 9, 2020 Shift I 

The Physics section was considered to be the toughest by test takers. 

  • Physics included a lot of formula-based questions.
  • The Mathematics section was easy in terms of difficulty level but it was quite time-consuming. Therefore, attempting the desired number of questions was challenging.
  • Many Chemistry questions were asked from NCERT with a few complex portions. 
  • There were 4-5 questions in the Mathematics section from Calculus.
  • Many questions asked in Physics were from thermodynamics, modern physics, resistance, and fluids. 
  • The Chemistry section had questions from coordination compounds. 6-8 questions were asked from inorganic chemistry while a majority of questions were from organic chemistry.

JEE Main B.E/ B. Tech Paper January 9, 2020 Shift II

The Physics section was considered to be very tough by the test takers. 

  • The Chemistry section was considered the easiest. Many organic chemistry questions were asked from the exercises given in NCERT books.
  • The Mathematics section had an easy to moderate level of difficulty with high weightage given to the Class 12 syllabus.
  • Physics was found to be the most difficult section, and according to candidates, more weightage was given to the Class 11 syllabus.
  • Many questions in mathematics were asked from Vector, 3D, Probability, and AP. 
  • Moment of inertia and center of mass were some of the topics asked in Physics. 
  • Numerical value-based questions were conceptual and easy to attempt, provided that the test-takers had a clear conceptual base. 

Must Read

September Session

Shifts Exam Start Exam End
Shift I 09:00 AM 12:00PM
Shift II 03:00 PM 06:00 PM

JEE Main – Sept 6 (Morning Shift) Paper Analysis for B.E/B.Tech

JEE Main September 6 morning session for BE/B.Tech was conducted successfully from 9:00 AM to 12: PM. Here's what test-takers said about the level of Paper-

  • Physics section was considered moderate to difficult and toughest in comparison to the other two sections.
  • Questions from Optics, Modern Physics, Electrostatics and Magnetism, EMI and thermodynamics were asked in physics.
  • Numerical Questions in Physics were mostly asked from class 11th syllabus while theoretical portion was mainly from class 12th.
  • Mathematics section was moderate to difficult following the earlier trend. Questions were lengthy and that made the paper a bit tougher.
  • Questions from Calculus, Trigonometry, Algebra and Geometry had more weightage. The Conic section and 3-D had the toughest questions.
  • Chemistry was again the easiest of all the sections but had some tricky questions. NCERT based direct questions were asked. 
  • Questions from Chemical bonding, Coordination compound, were asked majorly. Inorganic chemistry had the most weightage.
  • An attempt of 38-42 questions will be considered a safe score.

JEE Main – Sept 6 (Afternoon Shift) Paper Analysis for B.E/B.Tech

JEE Main 2020 September 6 Afternoon Session was held from 3:00 PM to 6:00 PM, Opinions of the students are mentioned below.

  • Chemistry was easy just like all the previous sessions but organic chemistry was a little tough for most of the students. Questions from Physical chemistry were easy to moderate, Inorganic chemistry was easy.
  • Inorganic chemistry consisted of questions from Elements, Acid and Bases. In Physical Chemistry, questions from Enthalpy, thermodynamics, Mole concepts were asked. 
  • Physics was considered to be tougher than maths and chemistry comparatively. Questions were conceptual and application-based just like the previous sessions. Numerical questions from mechanics were asked. No direct questions were asked.
  • Mathematics section was time-consuming therefore candidates believed it to be moderate to difficult level., No questions from integral calculus and circles were asked. Other sections of mathematics included questions from Vectors, Conic sections, Differential calculus, Algebra, etc.
  •  An attempt of 40-42 questions in the overall paper will be considered a safe score.

JEE Main – Sept 5 (Morning Shift) Paper Analysis for B.E/B.Tech

B.E/B.Tech paper for morning shift of JEE Main September session Day 5 was conducted successfully from 9.00 AM to 12.00 Noon.

  • Continuing with the trend for the current session so far, Physics came across as the toughest section to the candidates.
  • Most of the questions in Physics were application based and time-consuming.
  • Numericals in the Physics questions were mostly from the syllabus of class 11th. Whereas, the theory-based questions were from the syllabus of class 12th. 
  • The initial reaction of candidates towards Mathematics was quite divided, some found it easy and for some, it was tougher than Physics as well.
  • Some questions in Mathematics were from the topics – Vectors, 3-D, Complex numbers, Integration, Calculus, Coordinate Geometry.
  • Chemistry had mostly factual questions, Chemical bonding and Coordination compounds proved to be important topics for the section. 
  • As per the experts, 36-40 questions with 90 percent accuracy can be counted as a good attempt. 

Check JEE Main Answer Keys

JEE Main – Sept 5 (Afternoon Shift) Paper Analysis for B.E/B.Tech

JEE Main afternoon shift on September 5, 2020 was conducted as per schedule between 3.00 PM to 6.00 PM. Paper Analysis for the same is as follows:

  • Many candidates pointed out that questions specially from Chemistry and Maths were similar to NTA Abhyas app mock test questions, in terms of pattern and difficulty level.
  • The Chemistry section had more questions from Inorganic chemistry than Organic.
  • As per experts, attempting 15-16 questions in Chemistry with 95% accuracy can be counted as a good attempt for the section.
  • Questions in the chemistry section were easy in terms of difficulty level, some candidates found the options to be very tricky. 
  • Physics questions were found to be difficult and mostly calculative, electrostatics was given weightage. 
  • Mathematics was scaled as easy to moderate as per difficulty level. 

JEE Main – Sept 4 (Morning Shift) Paper Analysis for B.E/B.Tech

JEE Main B.E/B.Tech paper was conducted successfully from 9.00 AM to 12.00 Noon, paper analysis for the same is as follows:

  • As per the initial reaction of the test takers, mathematics was easy to moderate, physics was moderate and chemistry was easy in terms of difficulty level.
  • Some candidates also observed that a lot of questions were quite similar to the mock tests of NTA Abhyas App.
  • Physics and Mathematics, both of these sections were found to be lengthy.
  • Molecular orbital theory was an important topic for the chemistry section.
  • Some topics from which questions were asked in Mathematics were calculus, measurements and 3-D geometry.
  • As per the experts, overall 35-45 questions with around 90% accuracy can be considered a good attempt for the paper. 

JEE Main – Sept 4 (Afternoon Shift) Paper Analysis for B.E/B.Tech

Day 4 of JEE Main September session papers concluded successfully with the afternoon shift of B.E/B.Tech paper, the exam analysis as per the test takers is as follows:

  • The paper overall was found to be of easy to moderate difficulty level, physics being the most complex section.
  • Most of the candidates found mathematics easy surprisingly, length of the section however was a concern for the candidates.
  • Chemistry overall was scaled easy in terms of difficulty level, specially questions from organic chemistry were found to be easy by candidates.
  • Organic chemistry contributed around 6-7 questions to the chemistry section. 
  • There were a few tricky questions from chemistry in everyday life. 
  • Physics sections had some questions from mechanics, magnetism, electrostatics etc. 
  • Candidates who had also appeared for the January 2020 section found the paper much easier comparatively.

JEE Main – Sept 3 (Morning Shift) Paper Analysis for B.E/B.Tech

B.E/B.Tech paper for morning shift of JEE Main september session Day 2 was conducted successfully from 9.00 AM to 12.00 Noon. 

  • Mathematics was observed to be the toughest section in terms of the difficulty level.
  • The paper was overall of a moderate difficulty level as per the initial reactions of the test takers.
  • Some candidates mentioned that more weightage was given to class 11th syllabus.
  • Numerical answer value based questions were particularly found to be lengthy.
  • Physics was scaled as moderate in terms of difficulty level, and chemistry the easiest of the 3 sections. 

JEE Main – Sept 3 (Afternoon Shift) Paper Analysis for B.E/B.Tech

B.E/B.Tech Paper for the afternoon Shift was held successfully from 3:00 PM to 6:00 PM. This is how the exam was according to the examinees.

  • Mathematics Paper was lengthy and tricky just like the previous sessions. Questions from calculus had more weightage.
  • Vectors, 3-D Geometry, Complex numbers, Conic Sections questions were also asked.
  • Chemistry was again the easiest of all sections. Direct questions from NCERT were asked.
  • Around 7 questions from organic chemistry were asked. Integer type questions were a little tough and lengthy. Physical Chemistry was easy.
  • Physics was considered moderate and based on the application of concepts.
  • Questions from Modern Physics, Electromagnetism, Electrostatics and Rotational motion, were asked in physics.
  • Overall Paper was moderate level, and easier in comparison to January session. 

JEE Main – Sept 2 (Morning Shift) Paper Analysis for B.E/B.Tech

Morning shift on September 2 concluded between 9.00 AM to 12.00 Noon. B.E/ B. Tech paper is divided into three sections i.e. Physics, Chemistry and Mathematics. 

  • The paper was overall of a moderate to difficult in terms of level of difficulty.
  • Physics was found to be the toughest section by the test takers.
  • Direct questions from NCERT were also spotted by candidates.
  • Mathematics was found to be of a moderate level but time consuming.
  • Some candidates pointed out that more weightage was given to class 12th syllabus.
  • Mathematics section questions were observed to be well spread out among all the topics.
  • Chemistry was the easiest of the three sections. However some of the questions from the section were found to be tricky.
  • Numerical value answer based questions were difficult to solve, while the paper was seen as easier in comparison to the January session. 

JEE Main – Sept 2 (Afternoon Shift) Paper Analysis for B.E/B.Tech

JEE Main Afternoon shift for B.E/B.Tech paper was conducted from 3.00 PM to 6.00 PM. Here is an analysis based on the reaction of the test takers:

  • The difficulty level of the paper was almost similar to the January session.
  • Mathematics was observed as the most difficult section out of the three. Around 12 questions were asked from Class 11th and 13 questions were asked from Class 12th syllabus. 
  • A couple of questions in maths were from the topic Vectors, five questions from Coordinate geometry and 4 questions from Algebra.
  • Chemistry was found to be easy with direct questions from NCERT. Questions from the Biomolecule test were asked from Organic Chemistry.
  • Chemistry consisted of 12 questions from class 11th and 13 questions from class 12th syllabus. 8 questions were asked from Organic, 9 from inorganic, and 8 from physical chemistry.
  • The paper was time consuming. A lot of candidates complained about not being able to attempt the number of questions as they per their plan. 
  • Physics section was scaled moderate in terms of difficulty level by the candidates.
  • In Physics around 11 questions were asked from Class 11th and 14 questions from Class 12th Syllabus. Five questions were asked from Mechanics and four from thermodynamics and three from Optics.

Frequently Asked Questions

JEE Main B.E/B.Tech Paper FAQs

Ques. How can I prepare for JEE Main 2021 B.E/B.Tech?

Ans. To prepare for JEE Main B.E/B.Tech, 

  • Familiarize yourself with the topic-wise weightage of each section and devise a study plan accordingly. 
  • Refer to NCERT Physics, Chemistry, and Mathematics books of Classes 11 and 12 along with additional textbooks and practice books. 
  • Make comprehensive notes and write all formulas down on a sheet of paper. 
  • Take mock tests regularly. 
  • Solve question papers from the previous years. 

Ques. What are the best books for JEE Main B.E/B.Tech?

Ans. The best books for JEE Main B.E/B.Tech are - 

  1. NCERT Physics, Chemistry, and Mathematics books of Classes 11 and 12
  2. Concepts of Physics by H.C.Verma
  3. Practice Book Chemistry For JEE Main and Advanced 2020 by Arihant Experts
  4. Problems Plus in IIT Mathematics by A. Das Gupta

Ques. Is JEE Main B.E/B.Tech 2021 paper tough?

Ans. JEE MainB.E/B.Tech paper has a difficulty level that ranges from moderate to difficult. The Physics section is generally very challenging with MCQs and Numerical Answer Type (NAT) questions. The Chemistry section is generally easy with MCQs and Numerical Answer Type (NAT) questions. The Mathematics section is time consuming with MCQs and Numerical Answer Type (NAT) questions.

Ques. Does JEE Main B.E/B.Tech has negative marking?

Ans. Yes, JEE Main B.E/B.Tech has some questions with negative marking. The paper has two types of questions - MCQs and Numerical Answer Type(NAT) questions. 20 MCQs and 5 NAT questions are to be answered in all sections. MCQs have negative marking (-1 for an incorrect answer) while NAT questions do not have negative marking (0 for an incorrect answer). 

Ques. What comes in the B.E/B.Tech paper?

Ans. B.E/B.Tech is the Paper 1 of JEE Main. The JEE Main B.E/B.Tech has three sections. Section I is the Physics Section. Section II is Chemistry and Section III is Mathematics. According to revised JEE Main 2021 B.E/B.Tech Exam Pattern, 25 MCQs and 10 Numerical Answer Type (NAT) questions are asked in all sections. Students will have to answer 25 MCQs and 5 NAT questions. The exam is conducted in the Computer-Based Test (CBT) Mode. 

Ques. How many times in a year can I take the JEE Main B.E/B.Tech paper?

Ans. The National Testing Agency has released a new set of rules according to which students can take up the JEE Main B.E/B.Tech paper four times in one year. If you choose to appear for the exam four times, then the best score will be considered your final score.

*The article might have information for the previous academic years, which will be updated soon subject to the notification issued by the University/College.

JEE Main 2021 : 17 answered questions


Ques. What are the basic criteria required for joining PEC Chandigarh?

● Top Answer By Shobhna Chaturvedi on 02 May 21

Ans. Below are the procedures to get admission in undergraduate courses at PEC Chandigarh.  You will have to score at least 75% in your board exam, it is the basic criteria to appear in JEE Main. Appear and secure a good score in JEE Main. You will get three consecutive attempts for JEE Main. Admission at PEC is purely based on JEE Main score. You can check the recent cutoff for PEC on the official website to get an idea of what to expect. All the qualified candidates have to participate in the counseling process and they are allotted seats as per the rank secured in JEE Main and choices elected by them. If you are applying for admission one year after your 10+2, you will need to produce a gap year certificate during counseling. So, these are some eligibility criteria for you to keep a note of.Read more
1 Answer

Ques. What exam must one clear and with what cutoff to get into IIIT Hyderabad?

● Top Answer By suyashi choubey on 19 Mar 21

Ans. There are different examinations to get admission at IIIT Hyderabad. The mode of admission at the institute is as follows.  JEE Main: Ensure that you score 270+ in the JEE Main to get a seat in a course of your interest. Through this mode, you can even take admission for all branches except CLD, CHD. Test and Interview: If you want to get a seat in the CLD or CHD course can definitely go for this mode of admission.  In this mode, you will experience at first a test and after that, all who clear the test will be called for a Personal Interview.  However, there is no definite cutoff for the test, but you need to give your personal best to qualify for the interview. NTSE, KVPY: First, you have to clear a test. Those who qualify for the test are called for a Personal Interview.  From there, candidates are selected for admission. However, this mode of admission is for the CND course only. DASA mode: This mode is especially meant for the students who have studied 11th and 12th(or equivalent) outside India and are valid foreign passport holders. Generally, all branches accept admission through this mode.  A valid SAT II score of above 2000 is a must-needed criterion. SAT I score is taken into consideration in case of ties. Olympiad mode: This mode is only applicable for students who have been selected for training in Science and Linguistics to represent India in International Olympiads.  In this mode, students are chosen through a Personal Interview. Admissions are granted for CSD, ECD, CND, BSD, and CLD branches. Lateral Entry:  In order to get a seat through this mode of admission, there is a test and a personal interview round. Generally, children are admitted to the second year in IIIT-H through lateral entry. As what other colleges teach in 2 years, IIIT-H teaches in the first year itself. This mode of admission is meant for students who have completed their first two years of engineering in either Computer Science or Electronics branch from any other college. Students are admitted to the CSD branch if they were in the Computer Science branch in their college or to ECD if they were in the Electronics branch.Read more
1 Answer

Ques. Which one is better, dropping a year for the BITSAT and JEE, or joining universities such as LPU or Amity?

● Top Answer By Rupesh Biswas on 12 Feb 21

Ans. Every candidate has their own perspectives and reasons for dropping a year or opting for a degree in any institute. It entirely depends upon your thoughts and decisions, and what you actually want from your career. The points mentioned below can be considered as a set of guidelines that would help to choose the right path. There are several choices which you can make in case of admission. You can prefer a good renowned government college and take any available stream in it, or a good private college (BITS, Thapar, etc) and choose your favorite stream. Considering the fact that you are comfortable with the high fees of the private institutes. Having an educational gap (drop) of one year is not a bad thing for a future career. Most candidates get to learn a lot of things from the self-available time, even some have genuine reasons for the drop. So, if you are extremely passionate about a stream, it is absolutely all-right to drop for a year. Check for the 50% quota for insiders in your home state NIT. If present, it will increase the chances of getting some stream in it. Usually, it is considered that the stream matters much less. What matters is the college name tag. There are several other institutes like Punjab University, UIET, etc which provide good infrastructure and opportunities. JAC is a committee for counseling in some good institutes in Chandigarh. These are some of the basics tips that would help you in the decision-making process.Read more
1 Answer

Ques. Which is better: JEE or BITSAT?

● Top Answer By Aniket Atul Mahulikar on 20 Jan 21

Ans. Both JEE and BITSAT are competitive entrances and comparing the two is not a good decision. Instead, try to focus on understanding the basics and concepts since the syllabus for the two entrances is pretty much the same. If you prepare religiously for JEE Advanced then you will be able to ace all engineering entrance exams including JEE Main and BITSAT. The table given below gives a brief comparison of the exams: Exam JEE Advanced BITSAT Mode of Exam Computer-based Test Computer-based Test Duration 3 Hours 3 Hours Type of Questions Multiple Choice Questions, Numerical Aptitude Questions Multiple Choice Questions Negative Marking Yes Yes  Syllabus Physics, Chemistry, Maths Physics, Chemistry, Maths, English and Logical Reasoning  JEE Preparation: JEE Advanced paper includes questions primarily from Physics, Chemistry and Maths, thus, try to give these topics enough time and practice.  While it is best to focus on JEE Advanced, it is equally important to prepare for BITSAT since the exam syllabus contains not only Physics, Chemistry, and Maths but also English and Logical Reasoning. BITSAT Preparation: Cracking BITSAT is all about technique and speed so try to practice online mock tests, previous year papers, and cover topics like English and Logical Reasoning to score better in the exams.  You should devote at least 3 months to BITSAT, three months are enough if you have a clear understanding of your basics and a strong foundation. Try not to compare the two exams; instead, focus on clearing your basics with the aim of cracking JEE Advanced so that you can score well in both JEE and BITSAT.Read more
1 Answer

Ques. Which books have you used for the JEE Main and the BITSAT?

● Top Answer By Sudeshna Bhar on 20 Jan 21

Ans. There are several books you can refer to for the preparation of JEE Main and BITSAT exams. But the most important thing to do is to focus on NCERTs and practice online mock tests, previous year question papers, and question banks for every subject. It is equally important to study the exam pattern, type of questions, and syllabus of JEE Main and BITSAT before purchasing any reference book.  Subjectwise Books for JEE Main and BITSAT- Physics: Concepts of Physics by H.C. Verma: The best book for Physics. The book contains several practice questions for you to solve. Fundamental Physics by Halliday, Resnick, and Walker: It contains all the relevant topics. Understanding Physics by DC Pandey: This is the ideal book for JEE entrances; it covers all the relevant questions and topics.  Prep Guide to BITSAT by Arihant publications is a good book for BITSAT. Chemistry: Physical Chemistry: Modern Approach to Chemical Calculations by RC Mukherjee. It contains several practice questions for your reference. Organic Chemistry: A book by Paula Y. Bruice: It is the best for clearing doubts and building a strong foundation in Organic Chemistry. Inorganic Chemistry: Concise Inorganic Chemistry by J.D.Lee: The book covers all the relevant topics and contains several questions The Cengage set of 6 books by KS Verma. Mathematics: New Pattern JEE Mathematics Arihant Publications by SK Goyal. Algebra, Different Calculus, Integral Calculus, Vector, and 3D Geometry by Arihant Publication. A problem book in mathematical Analysis by G.N. Berman Mathematics for JEE Advanced by G.Tewani IIT Mathematics for JEE by M.L. Khanna. Play with graphs by Amit Agrawal. Algebra by G Tewani All these books are great reference books for BITSAT and JEE Main but you must try to focus on NCERTs and practicing questions.Read more
1 Answer


ambar ahirawar
Which course require higher cutoff? BE or Btech ?
abdul nazir

Both courses are more or less similiar and IITs and NITs offer B.Tech degree programme rather than B.E. Cut offs for JEE  Mains varies iwth desired course as well as category of the candidate. The exam pattern for both courses are similar as well.

divakar sharma
Can I prepare for BE and Barch paper similarly?
abdul nazir

The exam pattern and syllabus are differemt for B.Tech and B.Arch,so you need to give special attention to each exam. There will be separate papers for BE and B.Arch papers for which number of questions may also vary.

yash raj singh
Can someone preparing for BITSAT prepare similarly for JEE paper as well?
common admission test

Yes, you can prepare BITSAT same as JEE main as the syllabus of JEE Main and BITSAT is almost same. Difference in both the exam is that, In BITSAT you have to solve more questions compared to JEE main.

dharshini rajendran
What is the difference in syllabus of BE Btech syllabus?
common admission test

Hii Dharshini, Greetings from collegedunia. The difference between these two courses is a minor kind. Since for both course the entrance exam is same i.e JEE main, therefore syllabus is also same. 

mizna harmain
Do we get choice in the questions?
common admission test

Hii Mizna, Greetings from collegedunia. Yes, JEE main have multiple choice Questions. For more details Kindly visit JEE MAIN PATTERN

vikram dewan
How many questions from chemistry are asked in the exam?
common admission test

Hii vikarm, Greetings from collegedunia. JEE Main 2021 Exam Pattern has been revised considering the syllabus reduction by CBSE and state boards and now Chemistry section consists of 30 questions. For more details Click Here

saurav kumar
What is the use of Mains exam?
rakhisree chatterjee

Hi, Joint Entrance Examination - Main or commonly known as JEE Main is a national level entrance exam conducted by the NTA to offer admission to BE/BTech, BPlan and BArch courses at the IIITs (Indian Institute of Information Technology), NITs (National Institute of Technology) and other institutes. For more information, please refer, JEE Main.

ashish singh
When this exam will held in 2021
rakhisree chatterjee

Hi, JEE Main Exam Dates are as follows:

  • Session 1 - February 23 to 26, 2021 
  • Session 2 - March 15 to 18, 2021 
  • Session 3 - April 27 to 30, 2021 
  • Session 4 - May 24 to 28, 2021

For more information, please refer, JEE Main.

shivkumar dama
After scoring 95 marks in general category what will be my rank?
gouri kumari
In how many languages is the exam conducted?
common admission test

Hii Gouri, JEE Main 2021 will be conducted in English, Hindi and 11 other regional languages. To know more details please Click Here

In which colleges can I take admission after passing mains and advance?
rohan bharti
For how long can I use my mains score?
rakhisree chatterjee

Hi,  they are valid for 2 years but only for qualification to JEE Advanced. For admission procedure your JEE mains score is valid only for 1 year. For more information, please refer, JEE Main Exam.

shatakshi patki
Can mains exam be given by 10th passed?
common admission test

Hii Shatakshi, Greetings from collegedunia. No, The basic requirement to take JEE Main 2021 exam is to pass a 10+2 examination. For more details Click Here

surabhi s
Where can I get the tips from the toppers?
Do I need to attach caste certificate if im applying for reservation under SC category?
rakhisree chatterjee

Hi, Yes, A valid caste certificate as per the prescribed format, given on the JEE (Advanced) 2020 website, issued on or after 01-April-2020, should be uploaded for availing the benefits of caste category.

ammar zaheer ahmed
Do we get choice in the questions?

Hi Ammar

There are total 75 questions in B.E/B.Tech, 77 Questions in B.Arch and 100 questions in B.Planning. All the questions are MCQs and numerical based you will get 4 options in the MCQ questions and you need to choose one correct option from it. For more details about the exam pattern you can visit on our official webiste of JEE Main Exam Pattern and Syllabus.

ambar ahirawar
Where can I get previous year paper?
rakhisree chatterjee

Hi, National Testing Agency releases the official JEE Main question papers with answer key/solutions on the official website- Click Here to download the JEE Main previous year question paper of 2020, 2019, 2018.

kunal thakrar
Is it compulsory to attempt all the questions?

Dear Kunal Thakrar

Greetings from Collegedunia. According to the new pattern of the JEE Main Examination, you have to appear in 3 Papers to qualify for JEE Main Examination and there is a negative marking for each incorrect answer i.e -1 marks while 4 marks are given for each correct answer. So, you have to attempt all questions to score good marks in JEE Main Examination. For more details, kindly go through this link – JEE Main Syllabus

Which topics are main in Maths?
rakhisree chatterjee


Important Topics for JEE Main 2020 in Mathematics

  • Sequence & Series.
  • Determinants and Matrices.
  • Sets and relations.
  • Mathematical Reasoning.
  • Statistics & Probability.
  • Vector & 3D.
  • Straight line.
  • Circle.