JEE Main Unofficial Answer Key 21 January 2026 LIVE UpdatesJEE Main Unofficial Answer Key 21 January 2026 LIVE Updates: Today is the first day of the JEE Main Session 1 exam 2026. The shift 1 exam has already ended at 12 PM, and now, our CollegeDekho team is trying to connect to the test takers and collecting the memory-based questions. Next, our subject matter expert will analyse the paper and add the unofficial answers to the same. Along with this, candidates can also access subject-wise PDFs here, which will be released by the coaching institutes. This will enable candidates appearing for the JEE Main exam on 21 January to stay connected with this live blog and find the correct answers to the questions. It will, in turn, help them to assess their performance level before releasing the results.
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| JEE Main Question Paper 2026 January 21: Memory-based questions Physics, Chemistry, and Mathematics | JEE Main Predicted Percentile Score January 2026 Session 1 Live Updates |
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JEE Main Unofficial Answer Key 21 January 2026 Shift 1 by CollegeDekho
Check out the JEE Main 21 January shift 1 subject-wise questions and their correct answers here:Mathematics:
| Questions | 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 |
6.
 | 28√3 (Not given as an option) |
| 7. Consider a set S={a,b,c,d}. The number of reflexive as well as symmetric relations from S------> S are | 64 |
| 8. The locus of the point of intersection of the tangent drawn to the circle (x-2) 2 +(y-3) 2 =16, which subtends an angle of 120°, is: | 3x 2 +3y 2 -12x-18y-25=0 |
9.
 | 7 |
Physics:
| Questions | 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 |
| 6. An air-filled capacitor of capacitance C filled with dielectric (k=3) of width d/3, where d is sepration between plates. The new capacitance is: | 9C/7 |
Chemistry:
| Questions | 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 Unofficial Answer Key 21 January 2026 Shift 2 by CollegeDekho
Find out the Day 1 shift 2 JEE Main Session 1 subject-wise unofficial answer key here:
Physics:
| Questions | Answers |
|---|---|
1. In a circuit, there is a battery with internal resistance r and an emf E, which is connected to an external load resistance R as shown. Find the value of R so that the maximum power dissipates across R.
 | R=r |
2. Refractive index of the prism is √2. What should be the angle of incidence for a light ray such that the emerging ray gazes out of the surface?
 | 90° |
| 3. Keeping the significant figures in view, the sum of the physical quantities 5.01 m, 153.2 m, and 0.123 m is | 205.3m |
4. The total length of potentiometer wire AB is shown in the arrangement in the fig. If P is the point where the galvanometer shows zero reading, then the length of AP is:
 | 30 |
| 5. the Kinetic energy of a simple harmonic oscillating with an angular frequency of 176 rad/s. The frequemcy of the simple harmonic oscillator is - Hz (π=22/7) | 88 |
Mathematics:
| Questions | Answers |
|---|---|
1.
 | 104 |
2.
 | 16 |
| 3. Let y2= 16x, from point (16, 16) a focal chord is passing. Point ( α, β) divides the focal chord in ratio 2:3, then minimum value of α+ β is | 11 |
Chemistry:
| Questions | Answers |
|---|---|
|
1. Statement I: The correct order for radius is Al>Mg>Mg
2+
>Al
3+
Statement II: Atomic size always depends on electronegativity Choose the correct option | Both statements I and II are incorrect |
2.
 | 5 |
| 3. The rms speed of oxygen molecules at 47°C is equal to that of Hydrogen molecules kept at ____°C | -253 |
| 4. 1 g of an organic compound produces 1.49 g of Mg 2 P 2 O 7 . Determine % of Phosphorous? | 45%-46% |
|
5. Following 4 molecules are given, and among them, one is optically active. Find the percentage of carbon in that compound:
a. n-propyl Chloride b. iso-propyl Chloride c. iso-butyl Chloride d. Secondary-butyl chloride | Option d. |
JEE Main Unofficial Answer Key 21 January 2026 Shift 1 by Coaching Institutes
Candidates can find out the coaching institute-wise, subject-wise JEE Main Unofficial answer key for January 21 shift 1 here in the following table:
Name of the Coaching Institute | Shift 1 PDF Links |
|---|---|
| Vedantu | |
Resonance | |
Aakash | |
Narayana College | To be updated once available |
Sri Chaitanya | To be updated once available |
Reliable Kota | To be updated once available |
MathonGo | To be updated once available |
The candidates will find out the day-wise and shift-wise JEE Main Session 1 exam analysis, released by the CollegeDekho subject matter experts and several coaching institutes. For getting the latest updates regarding Day 1 analysis, stay connected with this live blog.
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JEE Main Unofficial Answer Key 21 January 2026 LIVE Updates
10 00 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Expected Marks for 95.3 percentile
Difficulty Level Expected Marks Easy 135+ Moderate 122.7+ Hard 100.9+ 09 40 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Expected Marks for 95.7 percentile
Difficulty Level Expected Marks Easy 138.5+ Moderate 126.2+ Hard 104.5+ 09 20 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Expected Marks for 96.1 percentile
Difficulty Level Expected Marks Easy 142+ Moderate 130.1+ Hard 108.4+ 09 00 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Expected Rank for 96.9 Percentile
Particulars Details Expected Rank 46500 or less Admission Possibilities - Mid Tier NITs with ECE, Mechanical, or Electrical Engineering
- Lower NITs with CSE
- IIITs with CSE or IT
List of Mid-Tier NITs NIT Raipur, NIT Jamshedpur, NIT Silchar, NIT Jalandhar.
List of Lower NITs NIT Srinagar, NIT Arunachal Pradesh, NIT Agartala 08 40 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Expected Marks for 96.9 Percentile
Difficulty Level Expected Marks Easy 150.6+ Moderate 138.7+ Hard 116+ 08 20 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Expected Marks for 97.7 Percentile
Difficulty Level Expected Marks Easy 160.6+ Moderate 148.9+ Hard 126.2+ 08 00 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Expected Marks for 97.3 Percentile
Difficulty Level Expected Marks Easy 155.2+ Moderate 143.3+ Hard 120.6+ 07 40 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Expected Marks for 96.7 Percentile
Difficulty Level Expected Marks Easy 148.3+ Moderate 136.5+ Hard 114+ 07 20 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Expected Rank for 96.5 Percentile
Candidates who will obtain 96.5th percentile in the JEE Main Session 1 exam might secure AIR 52500 or less. This is a good percentile, with which the candidates can secure a seat at any mid-tier NITs, such as NIT Raipur, NIT Agartala, NIT Silchar, NIT Hamirpur, or at IIIT Manipur, IIIT Dharwad, IIIIT Bhagalpur, or IIIIT Kalyani.
07 00 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Expected Marks for 96.8 Percentile
Difficulty Level of Paper Expected Marks Easy 149.4+ Moderate 137.5+ Difficult 115+ 06 40 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Shift 1 Mathematics Question (1)
Ques. If the mean and variance of observations x, y, 12, 14, 4, 10, 2 are 8 and 16, respectively, where x>y. Then, the value of 3x-y is
Ans. 18
06 20 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Shift 1 Physics Question (4)
Ques. A satellite is revolving around a planet in an orbit radius of 1.5 R. Additional minimum energy required to transfer the satellite to a new orbit radius of 3R is (m and M are the mass of the satellite & planet) GMm/ΠR then X is _______.
Ans. 6
06 00 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Shidt 2 Exam Over
Day 1 shift 2 JEE Main Session 1 exam ends. Soon, the test takers will be connecte,d and from them,the CollegeDekho team will collect the memory-based questions along with their feedback. Till then, stay tuned and keep an eye on this live blog.
06 00 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Shift 1 Chemistry Questions (3)
Ques. Which of the following compounds is paramagnetic in nature?
A. [Ni(CO)4]
B. [Ni(CN)4]2-
C. [NiCl4]2-
D. [Co(H20)6]3+
Ans. Option C.
05 40 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Shift 1 Physics Questions (3)
Ques. Find out the work done in moving a 2μC. Choose from A to B.
Ans. 34.3 μJ
05 20 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Shift 1 Physics Questions (2)
Ques. The focal length of the objective lens and eyepiece lens are 1.25 cm and 5 cm, and the tube length is 26 cm. Find the magnification of the compound microscope in normal adjustment.
Ans. 104
05 00 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Shift 1 Physics Question (1)
Ques. In a YDSE set up, a slab of width t is inserted in front og one of slit. The interference patterns shift by 0.2 cm on the screen. If the refractive index of slab is 1.5 than t is N μm (screen distance 50 cm and slits separation 1 mm) then N is ______
Ans. 8X10-6
04 40 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Shift 1 Chemistry Question (2)
Ques. Consider the following statements.
A.Propanal and Propane are functional isomers
B. Ethoxythane and methoxypropane are metamers
C. But-2-ene shows optical isomers
D. But-1-ene and But-2-ene are functional isomers
E. Pentane and 2, 2-dimethylpropane are chain isomers.
The correct statements are:
Ans. A, B and E only.
04 20 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Shift 1 Chemistry Question (1)
Ques. Finc change in internal energy of a gas if its temperature changes by 10K. Number of moles of gas is 10, Cp (specific heat at constant pressure of the gas is 7 cal/K/mol) and R (gas constant)= 2 cal/K.
Ans. 500 cal.
04 01 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Is 96 Percentile a good score?
96 percentile in the JEE Main Session 1 exam is considered a good score, with which the AIR of the candidates will likely be 60000 or less. Candidates with 96 percentile can also expect to secure a seat at the branches of NITs like NIT Raipur, NIT Silchar, NIT Hamirpur, and NIT Agartala.
03 00 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Expected Marks for 97.5 Percentile
Difficulty Level of the Paper Expected Marks Easy 157.5+ Moderate 145.8+ Difficult 123+ 02 40 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Expected Rank for 97.5 Percentile
Our CollegeDekho expert assumes that the AIR of the candidates will likely be 37500 or less if they obtain 97.5 percentile marks in the JEE Main Session 1 exam. Again, note that this is a tentative percentile vs rank analysis, which has been done based on the past years' trends. The actual rank might be slightly different.
02 20 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Expected Marks for 98.1 Percentile
Difficulty Level of the Paper Expected Marks Easy 167.2+ Moderate 155.5+ Difficult 132.8+ 02 00 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Expected Marks with 97.6 Percentile
Difficulty Level of Paper Expected Marks Easy 159+ Moderate 147.3+ Difficult 124.6+ 01 40 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Admission Probabilities with 98.7 Percentile
The AIR will likely be 19500 or less if the candidates get 98.7 percentile score in the JEE Main Session 1 exam. The candidates can secure a seat in any of the following NITs with 98.7 Percentile marks:
- NIT Trichy
- NIT Rourkela
- NIT Surathkal
- NIT Warangal
- MNNIT Allahabad
01 20 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Expected Marks for 98.7 Percentile
Difficulty Level of the Paper Expected Marks Easy 179.8+ Moderate 168.5+ Difficult 145.2+ 01 00 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Expected Rank for 98.4 Percentile
Our CollegeDekho expert, Supreeta Roy, who has 5+ years of experience inpercentile va rank analysis, assumes that the candidates with a 98.4 percentile score will secure 24000 or less in the JEE Main Session 1 exam. With this rank, the candidates can take admission to any of the following NITs, such as:
- NIT Trichy
- NIT Surathkal
- NIT Warangal
- NIT Calicut
- NIT Rourkela
- MNNIT Allahabad
- MNIT Jaipur
- VNIT Nagpur
- NIT Kurushetra
12 45 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Expected Marks for 99.2 Percentile
Difficulty Level of Paper Expected Marks Easy 169+ Moderate 157.5+ Difficult 134.6+ 12 30 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Admission Probabilities with 98.2 Percentile
NIT Category High Probability Branches Moderate Probability Branches Top Tier such as NIT Trichy, NIT Surathkal, NIT Warangal Mechanical, Civil, Chemical EEE, ECE Mid-Tier, such as NIT Jamshedpur, NIT Silchar, NIT Durgapur ECE, EEE, and Mechanical CSE (Possibly in later rounds) 12 15 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: What is the expected score for 98.2 Percentile?
To obtain a 98.2+ percentile, the candidates should get atleast 169 to 135 marks in the JEE Main Session 1 exam, if the paper is easy or difficult, respectively. The analysis has been made based on the previous years' trends.
12 00 PM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Shift 1 Exam Over
JEE Main 21 January shift 1 exam 2026 is over. Soon, the test takers will be connected, and candidates will get to know their feedback. Along with it, the shift 1 unofficial answer keys for the subjects will be added.
11 45 AM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: Marking Scheme
- Candidates will get 4 marks for every correctly marked answer
- 1 mark will be deducted for every incorrectly marked answer
- No mark will be deducted for the unanswered questions
Therefore, candidates' total score= [4X(Number of correct answers)- 1X (Number of incorrect answers)]
11 30 AM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: When to be released official answer key?
NTA has not yet declared the official date of releasing the JEE Main session 1 answer key. Tentatively, it will be released after 3 to 5 days of the last date of the Session 1 exam.
11 14 AM IST - 21 Jan'26
JEE Main Unofficial Answer Key 21 January 2026: When to be released?
The JEE Main 21 January shift 1 exam will end in an hour. After that, the CollegeDekho subject matter expert will release the shift 1 memory-based answers, and the same will be updated here. Till then, the candidates can find out other relevant information related to the JEE Main Session 1 exam here.
