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JEE Main 31st Aug 2021 Shift 1 Question Paper Analysis (Available), Answer Key

Sakunth Kumar
Sakunth KumarUpdated On: August 31, 2021 | JEE Main

Day 3 & Shift 1 of JEE Main 2021 Phase 4 has been conducted on August 31. Check the detailed question paper analysis of JEE Main 31st August Shift 1 exam along with memory-based question paper, solutions and answer key. The overall difficulty level was moderate.

JEE Main 31st Aug 2021 Shift 1 Question Paper Analysis, Answer Key

Day 3 & Shift 1 of JEE Main 2021 Phase 4 has been conducted on August 31 from 9:00 AM to 12:00 PM. As per the new exam pattern of JEE Main 2021, the question paper has a total number of 90 questions (instead of 75). Each section has 10 NAT (Numerical) questions, and the candidates are required to answer any 5 from each section. NAT questions do not have negative marking for the wrong attempt, and subject-specific questions have a negative mark of -1 for each wrong attempt. You can check the detailed question paper analysis of JEE Main 31st August 2021 Shift 1 along with section-wise difficulty level, weightage, memory-based question paper and solutions. The official answer key of JEE Main 2021 Phase 4 is expected to be released by September 4. On the other hand, the Phase 4 result of JEE Main 2021 can be expected by September 10.

Subject-wise Difficulty Level Rating of JEE Main 31st August Shift 1

The subject-wise difficulty level rating of JEE Main 31st August 2021 is as follows -

Overall Difficulty Level Rating2.77 out of 5
Physics Difficulty Level Rating2.97 out of 5
Mathematics Difficulty Level Rating2.70 out of 5
Chemistry Difficulty Level Rating2.64 out of 5

Major Highlights of JEE Main 31st August 2021 Analysis (First Reaction)

The shift 1 exam concluded at 12:00 PM. Here are some of the major highlights of JEE Main 31st August 2021 analysis -

  • Based on the first reaction of students, the overall difficulty level of the paper was moderate 
  • Chemistry was moderate and NCERT-based
  • Organic and Inorganic Chemistry had decent weightage. There were questions from Chemistry in Everyday Life, Environmental Chemistry, Biomolecules
  • Mathematics was moderate to easy. There were questions from Integration, Differential Calculus, Conics, Statistics, Mathematical Reasoning
  • Physics was moderate, and there were questions from Modern Physics, Semi-Conductors, Magnetism

Detailed JEE Main 31st Aug 2021 Shift 1 Question Paper Analysis

The detailed exam analysis of JEE Main 31st Aug 2021 Shift 1 has been updated. This analysis is based on student and expert feedback.

Aspect

Analysis

Overall Difficulty Level of the Exam

Moderate

Difficulty Level of Mathematics

Moderate

Difficulty Level of Physics

Moderate

Difficulty Level of Chemistry

Easy to Moderate

Chapters/ Topics with more Weightage in Mathematics

  • Calculus
  • Coordinate Geometry
  • Trigonometry

Chapters/ Topics with more Weightage in Physics

  • Thermodynamics
  • Mechanics

Chapters/ Topics with more Weightage in Chemistry

  • Organic Chemistry
  • Inorganic Chemistry

Difficulty Level of NAT Questions

Average

Expected Average Number of Good Attempts

39-43

Expected Number of Very Good Attempts

60+

Difficulty Level Comparison – Aug 31 Shift 1 vs July 25 Shift 1 vs March 18 Shift 1 vs Feb 26 Shift 1

Easier than Previous Sessions

Also Check: JEE Main 2021 August vs July vs March vs February Analysis

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Subject-wise Difficulty Level of JEE Main 31st August Shift 1

The subject-wise difficulty level of JEE Main 31st August Shift 1 is as follows -

Name of the SubjectTotal No. of Easy QuestionsTotal No. of Medium QuestionsTotal No. of Difficult Questions
Chemistry10180
Mathematics8102
Physics10119

Division of Syllabus in JEE Main 31st August Shift 1

The division of Class 11 & 12 syllabus in JEE Main 31st August 2021 Shift 1 is as follows -

Name of the SubjectTotal No. of Questions from Class 11 SyllabusTotal No. of Questions from Class 12 Syllabus
Chemistry1117
Mathematics1010
Physics1614

Physics Chapter-Wise Weightage in JEE Main 31st August Shift 1

The chapter-wise weightage of Physics in JEE Main 31st August 2021 Shift 1 is as follows -

Name of the ChapterTotal No. of Questions
Electrodynamics8
Heat & Thermodynamics2
Mechanics11
Modern Physics5
Optics2
SHM & Waves2

Physics Topic-Wise Weightgae in JEE Main 31st August Shift 1

The topic-wise weightage of Physics in JEE Main 31st August 2021 Shift 1 is as follows -

Name of the TopicTotal No. of Questions
Alternating Current1
Capacitance1
Current Electricity3
Electro Magnetic Field1
Electro-Magnetic Induction1
Electrostatics1
KTG & Thermodynamics2
Centre of Mass2
Circular Motion1
Elasticity & Viscosity2
Gravitation1
Rectilinear Motion & Vectors1
Rigid Body Dynamics1
Unit & Dimension2
Projectile Motion1
Electromagnetic Waves & Communication1
Nuclear Physics1
Semiconductors2
Atomic Physics1
Geometrical Optics & Physical Optics2
SHM1
String Wave1

Mathematics Chapter-Wise Weightgae in JEE Main 31st August Shift 1

The chapter-wise weightage of Mathematics in JEE Main 31st August 2021 Shift 1 is as follows -

Name of the ChapterTotal No. of Questions
Binomial Theorem1
Complex Numbers1
Coordinate Geometry2
Differential Calculus3
Integral Calculus4
Mathematical Reasoning1
Matrix & Determinants1
Permutation & Combination1
Sequence & Series2
Statistics1
Trigonometry2
Vector & 3D1

Mathematics Topic-Wise Weightage in JEE Main 31st August Shift 1

The topic-wise weightage of Mathematics in JEE Main 31st August 2021 Shift 1 is as follows -

Name of the TopicTotal No. of Questions
Binomial Theorem1
Complex Numbers1
Parabola1
Straight Line1
Application of Derivatives1
Continuity & Derivability1
Limit1
Definite Integration1
Differential Equation2
Indefinite Integration1
Mathematical Reasoning1
Matrices & Determinants1
Permutation & Combination1
Sequence & Series1
Statistics1
Trigonometric Ratio & Identities2
Vector1

Chemistry Chapter-Wise Weightage in JEE Main 31st August Shift 1

The chapter-wise weightage of Chemistry in JEE Main 31st August Shift 1 is as follows -

Name of the ChapterTotal No. of Questions
Inorganic Chemistry-16
Inorganic Chemistry-24
Organic Chemistry-29
Physical Chemistry-14
Physical Chemistry-25

Chemistry Topic-Wise Weightage in JEE Main 31st August Shift 1

The topic-wise weightage of Chemistry in JEE Main 31st August Shift 1 is as follows -

Name of the TopicTotal No. of Questions
Chemical Bonding2
Environmental Chemistry1
p-block (13-14) Grp1
Periodic Table & Periodicity in Properties1
s-block1
d-block & f-block Elements1
Metallurgy1
Qualitative Analysis1
p-Block 17-18 Grp1
Biomolecules1
Grignard Reagent, Reduction, Oxidation & Hydrolysis2
Organic Reaction Mechanism II2
Polymers1
Organic Reaction Mechanism IV1
Organic Reaction Mechanism III1
IUPAC & Isomerism1
Atomic Structure & Nuclear Chemistry1
Gaseous State1
Ionic Equilibrium1
Mole Concept1
Chemical Kinetics3
Solution & Colligative Properties1
Surface Chemistry1

Aakash Institute JEE Main 31st August 2021 Shift 1 Analysis

Here are the major highlights of JEE Main 31st August 2021 Shift 1 analysis by Aakash Institute -

  • The overall difficulty level of the paper was moderate with good syllabus coverage
  • Mathematics was moderate but some questions were lengthy
  • Mathematics had almost 7-8 questions from Calculus, 5 from Algebra, 3 to 4 from Vector & 3D, 4 from Coordinate Geometry
  • Physics was moderate in terms of difficulty level
  • The Physics section had almost 5 questions from Mechanics, 3 from Thermodynamics, 2 from Optics and 2 from Semiconductors
  • The chemistry section was easy to moderate, and there were an equal number of questions from Organic, Inorganic and Physical Chemistry
  • Physical Chemistry had almost numerical questions
  • There were also questions from Biomolecules, Polymers and Chemistry in Everyday Life

JEE Main 31st Aug 2021 Shift 1 Question Paper

You can download the PDF of JEE Main 31st Aug 2021 Shift 1 memory-based question paper from the link available below.

JEE Main 2021 Phase 4 Question Paper PDF(Available)

JEE Main July 2021 Phase 3 Question Paper

JEE Main March 2021 Question Paper

JEE Main February 2021 Question Paper

JEE Main Previous Years' Question Paper

JEE Main 31st Aug 2021 Shift 1 Unofficial Answer Key

Till the official answer key of JEE Main 2021 Phase 4 is released, you can download the unofficial answer key to estimate your score or percentile. The PDF can be downloaded through the link below.

JEE Main 2021 Phase 4 Unofficial Answer Key

JEE Main 2021 Phase 4 Response Sheet

JEE Main 2021 Rank Predictor

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JEE Main 2021 Phase 4 Exam Analysis (All Shifts)

You can check the shift-wise exam analysis of JEE Main 2021 Phase 4 by clicking on the links below –

JEE Main 26th Aug 2021 Shift 1 Question Paper Analysis

JEE Main 26th Aug 2021 Shift 2 Question Paper Analysis

Overall Analysis of JEE Main 26th August 2021 (Day 1)

JEE Main 27th Aug 2021 Shift 1 Question Paper Analysis

JEE Main 27th Aug 2021 Shift 2 Question Paper Analysis

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JEE Main 31st Aug 2021 Shift 1 Question Paper Analysis – Available on this Page

JEE Main 31st August 2021 Shift 2 Question Paper Analysis

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