JEE Main Session-1 Exam 2025 : 29 January Shift-1 Analysis, Review & Question Paper with Answer Key

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JEE Main 2025 January 29 Shift 1 exam is over now. JEE Main 2025 January 29 Shift 1 student feedback and analysis is updated here. Additionally, memory-based unofficial JEE Main 2025 answer key and question paper with solutions for January 29 exam is also uploaded.

Candidates can check the responses of JEE Main January 29, 2025 Shift 1 students, difficulty level of questions, paper analysis, 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 2025 Session 1 admit card to enter the JEE Main 2025 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 2025 will be held on January 22, 23, 24, 28 and 29. Paper 2A and 2B for BArch and BPlan candidates are scheduled on January 30, 2025 from 3:00 PM to 6:30 PM.

👉 JEE Mains 2025 (29 January Shift-1 Physics) Question Paper and Answer Key (Available)

👉 JEE Mains 2025 (29 January Shift-1 Chemistry) Question Paper and Answer Key (Available)

👉 JEE Mains 2025 (29 January Shift-1 Mathematics) Question Paper and Answer Key (Available)

JEE Main Session 1 Memory Based Paper 2025

Exam Dates	Physics	Chemistry	Maths
22 January 2025	Shift - 1	Shift - 1	Shift - 1
22 January 2025	Shift - 2	Shift - 2	Shift - 2
23 January 2025	Shift - 1	Shift - 1	Shift - 1
23 January 2025	Shift - 2	Shift - 2	Shift - 2
24 January 2025	Shift - 1	Shift - 1	Shift - 1
24 January 2025	Shift - 2	Shift - 2	Shift - 2
28 January 2025	Shift - 1	Shift - 1	Shift - 1
28 January 2025	Shift - 2	Shift - 2	Shift - 2
29 January 2025	Shift - 1	Shift - 1	Shift - 1
29 January 2025	Shift - 2	Shift - 2	Shift - 2

JEE Main Exam 29 January 2025 Shift 1 Overall Analysis Section-wise

The overall and section-wise difficulty levels of the paper are tabulated below in detail:

Parameter	Analysis
Overall difficulty level	Moderate to Tough
Difficulty Level of Physics	Easy
Difficulty Level of Chemistry	Moderate
Difficulty Level of Mathematics	Tough
Topics asked in Physics	Dimensions, Time Period in Pendulum, Wavelength and Kinetic Energy
Topics asked in Chemistry	Biomolecules, Halogens, Optical Rotation, CFSE
Topics asked in Maths	3D Vector - vector 3 to 4 questions

JEE Main Exam Analysis 29 January 2025 Shift 1: Students' Reviews

Candidates can check the JEE Main 2025 Exam Analysis for 29 January Shift 1 through the students' reactions who have appeared for the exam below.

Maths was tough with 3-4 questions from 3D Vector chapter
Physics was easy with 1 question from Ray Optics which was difficult, 1 question from Electrostatics, 2 question from Modern Physics out of which 1 was hard and 1 was doable. No questions from Current Electricity and Rotation chapter.
Chemistry was moderate with 1 question from GOC, 2 questions from Chemical Bonding. Most questions were from Physical Chemistry (around 11 questions) followed by Inorganic Chemistry then Organic Chemistry. Physical Chemistry dominated in numerical type questions. In few numericals Organic Chemistry was mixed with Physical Chemistry. 7-8 direct formula-based questions and rest questions were doable in Chemistry. No calculations were there in numericals of Physical Chemistry but direct equations were given.
Students were able to attempt only 9-12 questions in Maths.
As per many students who attended JEE Main 29 January 2025 Shift 1, 99 percentile would be 200-210 marks

JEE Main Jan 29 Shift 1 Student Reactions

As per the students feedback, overall the paper was moderate. Mathematics as usual was tough, and Physics and Chemistry was easy to moderate. However, the JEE Main paper 1 Jan 29 shift 1 was easy compared to JEE Main Jan 28 exam.

JEE Main 2025 January 29 Updates: Questions asked in shift 1 paper

Chemistry - Easy to Moderate. Had questions about Biomolecules, Halogens, Optical Rotation, CFSE.
Physics - Moderate. Important topics were Dimensions, Time Period in Pendulum, Wavelength and Kinetic Energy.
Mathematics - Tough

JEE Mains Jan 29 : Physics Paper Analysis

The JEE Main physics section was balanced. A few physics questions had confusing options. The section was balanced 2comprising concept and formula-based questions.

Overall, the physics had really good doable questions.

JEE Main Jan 29 Shift 1 Chemistry section was easy to moderate

The chemistry section of JEE Main January 20 shift 1 was easy. The questions were balanced covering the following topics -

Chemical bonding- 1 to 2 questions
Physical- had more questions than inorganic with 7 to 8 questions
Organic and physical chemistry were combined to form numerical questions, which were easy to attempt.

Physics

Mathematics

Chemistry

JEE Main 29 January 2025 Physics Shift 1 Question Paper with Answer Key Solutions

Here is JEE Main 29 January 2025 Physics question paper with answer key solutions for Shift 1.

Q.No.	Question	Answers
1	Assertion: At the peak of mountain, time period of pendulum increases Reason: Time period of pendulum increases with decrease in g	Assertion is correct, Reason is correct
2	The velocity of a particle moving on a straight line varies with time as v=At ²Bt/C+ t ¹where A, B, and C are constants. Find the dimension of ABC.	L ²T ^-3
3	A pendulum of mass m/2 is released from a given situation. Find the speed of another pendulum after the collision. (e=1)	2/3 √gl
4	The graph between wavelength (λ)of incident light and Kinetic Energy (K.E) of photoelectron in photoelectric effect is
5	Identify the logic gate represented by circuit shown below.	OR Gate
6	Statement I: Electromagnetic wave have both energy and momentum. Statement II: Rest mass of photon is zero.	Statement I is correct Statement II is incorrect
7	Two projectiles were launched from the same position simultaneously only same speed on of the projectile was launched at angle (45 - α) degree and other at an angle of (45 + α) degree. Find the ratio of maximum height of the projectile.	1 - sin 2α 1 + sin 2α
8	A river is flowing with speed 9km/hr. Boat is going downstream-speed of boat in still water is 27km/hr. A person in boat throws a ball upwards with speed 10 m/s. Find range of the ball as seen by an observer at bank of river.	20 m
9	Which of two physical quantities have same dimensions?	Angular momentum and Planck's constant
10	If radius of first Bohr's orbit of H-atom is a ₀Then find the radius of 2nd Bohrs orbit of H-atom.	4a ₀
11	Two coils having self-inductance L ₁and L ₂are placed closely such that they have a mutual inductance M. If the carry currents i ₁and i ₂as shown in the figure thane the induced emf in coil 1 is
12	An infinite solid cylinder wire of radius R carries a current I uniformly distributed along its area. The distance from the centre where the magnetic field is equal to μ ₀I/4πR is	R/2
13	When ball is kept under seat at depth 2.5km. Find percentage change in its volume. If bulk modulus of water is 2 x 10 ⁹Pa.	1.25%
14	Heat given to 0.5 moles of a monoatomic gas at constant pressure is 500J. Initial temperature of gas was 27 Degree Celsius. find value of ΔV and ΔT.	300J, 48 degree Celcius
15	Assertion: A negative potential is required to stop the photoelectron. Reason: Speed of electron decreases when a negative potential is applied in a photo cell.	Assertion is correct Reason is also correct
16	If electric dipole of dipole moment P is placed in electric field E with P\|\|E . It is rotated slightly (and slowly) and released. Find the time period of oscillation of dipole (moment of inertia of dipole is).	T= 2π √1/PE
17	In adiabatic process of closed system, work done by the gas depends explicitly on	Change in temperature
18	A particle is able to complete the vertical circular motion with speed n √gR at top most point. Find the ratio of ^KE(Bottom)/ ^KE(Top)	n ²+ 4 n ²
19		A (iii) B (ii) C (ii) D (i)
20	In a hydraulic lift, the two sides have areas A ₁= 25 cm ²and A ₂= 100 cm ². If a force of 100 N is applied normally on the area A ₁, then the force on the area A ₂is ____ N.	400 N

JEE Main 29 January 2025 Chemistry Shift 1 Question Paper with Answer Key Solutions

Here is JEE Main 29 January 2025 Chemistry question paper with answer key solutions for Shift 1.

Q.No.	Question	Answers
1	Which of the following is animal starch?	Glycogen
2	Statement-1: Correct order of ionic radius for Mg ²⁺, Na ⁺, O ^2-& F ^-is F ^-> O ^2-> Na ⁺> Mg ²⁺ Statement-2: Correct order of magnitude of gain Enthalpy for 17 ^thgroup follows order CI > F > Br > I (Magnitude only)	Statement 1 is incorrect & Statement 2 is correct
3	Calculate the total number of sigma and π bond in the given molecule?	15 bonds
4	Chromite ore + Na ₂CO ₃+ O ₂→ insoluble product containing Fe. Calculate the molar mass of insoluble product formed. (Given: Molar mass of Cr = 52 g/mol, Na = 23 g/mol, Fe = 56 g/mol, 0 = 16 g/mol)	160
5	Consider the following complexes- 1. [Mn(CN) ₆] ^4- 2. [Fe(CN) ₆] ^4- 3. [Fe(CN) ₆] ^3- 4. [Co(CN) ₆] ^3- Correct order of CFSE (Δ ₀) will be	4>3>2>1
6	Consider the following reaction Identify the final product P:
7	What is the value of van't Hoff Factor for A ₂B if 30% of A ₂B is dissociated?	1.60
8	Find the order of the reaction A+B → F if the mechanism of the reaction is given below: Step 1: A + B → D (slow) Step 2: D → C + E (fast) Step 3: C+E → F (fast)	2
9	Match the following (A) [Co(OX) ₃] ^3-- (i) sp ³d ² (B) [FeF ₆] ^3-- (ii) d ²sp ³ (C) [Ni(CO) ₄] - (iii) dsp ² (D) [PtCl ₄] ^2-- (iv) sp ³	A-(ii), B-(i), C-(iv), D-(iii)
10	What is the correct Nernst equation representation for the following cell reaction Mg(s) → Mg ²⁺+2e ^- Ag ⁺+e ^-→ Ag(s)
11	The correct order of melting point of d-block elements is:	Fe > Mn
12	Consider the following reaction- Find the mass of final product (D) formed in gm (nearest integer)	13
13	λ _mis directly proportional to √c for an electrolyte, then molar conductance for the same electrolyte at infinite dilution shows	small increase
14	Given that the ionisation enthalpy of element E _(g)is 300 kJ/mol and electron gain enthalpy of A, B, C and D gases atoms are -320 kJ/mol, -340 kJ/mol, -200 kJ/mol and -250 kJ/mol, then what will be the correct order of ionic nature of compounds?	EB>EA>ED>EC
15	Graph between de Broglie wavelength (λ _D) and kinetic energy (K) of an electron is
16	Which of the following ions is strongest oxidising agent	Pb ⁴⁺
17	How many of following can act as nucleophiles	6
18	Consider the following reaction If P is total pressure at equilibrium & K _pis equilibrium constant. Then α in terms of K _p& P is (Assume α << 1)	3√2k _p²/P

JEE Main 29 January 2025 Maths Shift 1 Question Paper with Answer Key Solutions

Here is JEE Main 29 January 2025 Maths question paper with answer key solutions for Shift 1.

Q.No.	Question	Answers
1	The minimum value of n for which the number of integer terms in the binomial expansion of (7 ^1/3+ 11 ^1/2) is 183, is	2184
2	lim (n→0) ∑ (k = 1 to n) [(k ³+ 6k ²+ 11k +5)/(k + 3)! = ?	5/3
3	Sum of first three terms of an AP with integral common difference is 54 and sum of first twenty terms lies between 1600 to 1800, find a ₁₁.	90
4	Area enclosed by y ≥ \|x - 1\|, y + \|x\| ≤ 3, x ²≤ 2y - 3 is A, then 6A is (in sq. units)	10
5	Find I = 80 ₀∫ ^π/2[(sinx + cosx) / (9sinx + 16cosx)]dx	(80/337) [(25π/2) + 7 ln(9/16)]
6	If R be a relation defined on (0, π/2) such that xRy sec ²x - tan ²y = 1, then the relation R is	Reflexive and transitive only
7	Number of 7 digit numbers made with the digits 1, 2, 3 such that sum of the digits is 11 is equal to	16!
8	If z ₁lies on \| z - 8 + 2i \| = 1 and z ₂lies on \| z - 2 - 6i \| = 2, then \| z ₁- z ₂\|min is (where i = √-1)	7
9	If cos ^-1x = π + sin ^-1x + sin ^-1(2x - 1), then find the sum of all values of x.	0
10	Find the minimum value of p such that lim (x→0+) { x ([1/x] + [2/x] + ... + [p/x]) - x ²([1/x ²] + [2/x ²] + ... + [9/x ²]) }	24

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