JEE Main Session-1 Exam 2026 : 21 January Shift-1 Analysis, Review & Question Paper with Answer Key

JEE Main 2026 January 21 Shift 1 exam is over now. JEE Main 2026 January 21 Shift 1 student feedback and analysis is updated here. Additionally, the memory-based unofficial JEE Main 2026 answer key and question paper with solutions for the January 21 exam are also uploaded.

👉 Amrita (AEEE) 2026 Applications Open - Apply Now

👉 VITEEE 2026 Applications Open - Apply Now

👉 LPU Applications Open - Apply Now

👉 Chandigarh University Admissions Open - Apply Now

👉 UPES Applications Open - Apply Now

Candidates can check the responses of JEE Main January 21, 2026, Shift 1 students, the difficulty level of questions, paper analysis, a memory-based question paper with answer key and solutions, etc.

Shift 2 will start at 03:00 PM and end at 06:00 PM. Candidates will have to show their JEE Main 2026 Session 1 admit card to enter the JEE Main 2026 exam centre for the shift 2 exam. Additionally, candidates will have to bring a government-issued photo identity card and a passport-sized photograph. Proper adherence to these entry requirements is necessary to attend the exam.

Paper 1 for BE/BTech candidates in JEE Main 2026 will be held on January 21, 22, 23, 24, and 28. Paper 2A and 2B for BArch and BPlan candidates are scheduled on January 29, 2026 from 9:00 AM to 12:30 PM.

👉 JEE Mains 2026 (21 January Shift-1 Physics) Question Paper and Answer Key (Available Soon)

👉 JEE Mains 2026 (21 January Shift-1 Chemistry) Question Paper and Answer Key (Available Soon)

👉 JEE Mains 2026 (21 January Shift-1 Mathematics) Question Paper and Answer Key (Available Soon)

JEE Main 2026 - Session 1 Exam Analysis

21 January | Shift 1 (Morning)

Overall Paper Analysis

• Overall Difficulty Level: Moderate to Tough
• Comparison with JEE Main 2025: The paper was moderate when compared to the previous year
• Subject-wise Difficulty Order: Chemistry > Maths > Physics
• Physics was easy with respect to Maths and Chemistry
• Chemistry was tough and lengthy this time

Mathematics Analysis

Difficulty Level: Moderate

• Questions were relatively less lengthy and calculation-intensive compared to Physics and Chemistry
• Most questions were lengthy and tricky, requiring good time management and strong calculation accuracy
• Compared to recent JEE Main trends, Mathematics was less tough due to extensive calculations and multi-step solving
• Mathematics was easier than last year
• Students needed clear conceptual understanding along with speed and precision

Topics Covered:

• Calculus – Relatively fewer questions
• Vector Algebra and 3D Geometry – 2-3 questions
• Quadratic Equations – 1 question
• Matrices – 1 question (lengthy)
• Sets and Relations – 2 questions
• Arithmetic and Geometric Progression
• Conic Sections (Parabola, Hyperbola) – 3 questions
• Application of Derivatives – 1 question
• Binomial Theorem
• Trigonometry

Physics Analysis

Difficulty Level: Easy to Moderate

• Physics was easy with respect to Maths and more challenging Chemistry paper
• JEE Main 21st January morning shift Physics paper was easy compared to last year's JEE Main
• The paper was doable for those who went through proper revision, as most questions were formula-based

Topics Covered:

• Thermal Properties of Fluids (Bernoulli's Theorem) – 1 question
• Optics (Microscope, Power of Lens) – 2 questions
• Semiconductor (Logic Gate) – 1 question
• Unit and Dimension (1-Dimension, Error) – 2 questions
• Current Electricity – 1 question
• Calorimetry – 1 question
• Rotational Motion (Moment of Inertia) – 1 question
• Kinematics – 1 question

Chemistry Analysis

Difficulty Level: Tough

• The overall difficulty level of Chemistry section was tough
• Chemistry was tough with respect to Maths and more challenging than Physics
• JEE Main 21st January morning shift Chemistry paper was tough compared to last year's JEE Main
• The paper was doable for those who went through proper revision, as most questions were assertion-type
• Chemistry paper was lengthy
• Inorganic Chemistry was prominent
• Students spent approximately 60-70 minutes in Chemistry

Topics Covered:

• Coordination Chemistry – 3 questions
• Chemical Bonding and Molecular Structure – 2 questions
• p-Block Elements
• Chemical and Ionic Equilibrium – 1 mixed question
• Mole Concept – 3-4 questions

21st January Shift-1 | Maths Analysis

Memory Based Questions - Chapter-wise Weightage

High Weightage Topics (5% and above):

1. Matrices and Determinants – 7.6%
2. 3D Geometry – 6.4%
3. Vector Algebra – 5.6%
4. Differential Equations – 5.6%
5. Sequences and Series – 5.2%
6. Permutations and Combinations – 5.2%
7. Limits, Continuity and Differentiability – 5.2%

Low Weightage Topics (below 2%):

1. Logarithm – 0.4%
2. Differentiation – 0.4%
3. Hyperbola – 0.8%
4. Statistics – 1.6%
5. Trigonometric Ratio and Identities – 1.6%

21st January Shift-1 | Chemistry Analysis

Memory Based Questions - Chapter-wise Weightage

High Weightage Topics (5% and above):

1. Coordination Compounds – 7.2%
2. Thermodynamics – 6.8%
3. Basics of Organic Chemistry – 6.8%
4. Periodic Table & Periodicity – 6%
5. Electrochemistry – 5.6%
6. Aldehydes, Ketones and Carboxylic Acids – 5.6%
7. Some Basic Concepts of Chemistry – 5.2%
8. d and f Block Elements – 5.2%
9. Hydrocarbons – 5.2%
10. Chemical Kinetics and Nuclear Chemistry – 5.2%
11. Compounds Containing Nitrogen – 5.2%

21st April Shift-1 | Physics Analysis

Memory Based Questions - Chapter-wise Weightage

High Weightage Topics (5% and above):

1. Current Electricity – 8%
2. Heat and Thermodynamics – 7.33%
3. Properties of Matter – 7%
4. Atoms and Nuclei – 6.67%
5. Units & Measurements – 5.50%
6. Electrostatics – 5.33%
7. Magnetic Effect of Current – 5.17%

Low Weightage Topics (below 2%):

1. Circular Motion – 1.83%
2. Center of Mass and Collision – 1.67%
3. Waves – 1.50%

Mathematics

Physics

Chemistry

JEE Main 21 January 2026 Chemistry Shift 1 Question Paper with Answer Key Solutions

Here is JEE Main 21 January 2026 Chemistry question paper with answer key solutions for Shift 1. 

Q.No.	Question	Answers
1	Find A
2		8
3	In 'S' estimation 0.7 g of an organic compound gives 1 g BaSO 4 in Carius method. What is the % of 'S' in the compound?	19.61
4	Which one among the following resonating structures is not correct?	Option A
5	Statement A: but-2-e show O.I. Statement B: Propanol & Propanone are F.G.I. Statement C: Pentane & 2,2- Dimethyl Propane are C.I correctly statement	Only B and C
6	% of N in E= ?	20

JEE Main 21 January 2026 Physics Shift 1 Question Paper with Answer Key Solutions

Here is JEE Main 21 January 2026 Physics question paper with answer key solutions for Shift 1

Q.No.	Question	Answers
1	A rod of mass m and length l is attached to two ideal strings. Find tension in the left string just after the right string is cut	mg/4
2	Which logic gate is given in the figure?	NAND gate
3		ML -1 T -4
4	Find the heat produced in the external circuit (AB) in one second.	(21X15)/16 (Not given as an option)
5	An α particle having kinetic energy 7.7 MeV is approaching a fixed gold nucleus (atomic number is 79). Find the distance of closest approach.	1.72 nm

JEE Main 21 January 2026 Mathematics Shift 1 Question Paper with Answer Key Solutions

Here is JEE Main 21 January 2026 Mathematics question paper with answer key solutions for Shift 1:

Q.No.	Question	Answers
1		4
2		11
3		2/3
4
5	The sum of roots of the equation lx-1l 2 -5lx-1l+6=0 is	4

-----

👉 Also Check  JEE Main & Advanced Study Material

👉 Also Check - JEE Main & Advanced 2026 Class 12: Physics Short Notes and PYQs with Solutions PDF

👉 Also Check - JEE Main 2026 Chapter-wise Weightage - Physics, Chemistry & Maths Complete Guide

👉 Also Check - JEE Main Maths 2026 Chapter-wise Weightage & Topics - Complete Guide

👉 Also Check - JEE Main Physics 2026 Chapter-wise Weightage & Topics - Complete Guide

👉 Also Check - JEE Main Chemistry 2026 Chapter-wise Weightage & Topics - Complete Guide

👉 Also Check - JEE Main 2026 Physics Syllabus: How Many Topics Deleted? Check Full List

👉  JEE Main & Advanced Study Material