IISER conducted the IAT 2025 exam successfully today, May 25, 2025, at various exam centres across the nation. The exam was conducted for the duration of three hours to test the domain knowledge of candidates in Mathematics, Physics, Chemistry, and Biology. The IISER 2025 answer key will be released anytime time today on the official website. Read this Shiksha article to learn about the IAT 2025 exam analysis, answer key and student response sheet and expected cut off.
IISER 2025 Exam Concluded; Exam Analysis, Difficulty Level
IAT 2025 exam for the admissions to BS-MS dual degree and BS degree programme was conducted successfully today, May 25, 2025. Test takers taken the examination to test their domain knowledge in Mathematics, Chemistry, Physics and Biology. The total time for answering the test was 180 minutes. Questions were of multiple choice type with only one correct answer. Students who had opted for PCM in their class 12 std, found the biology section comparatively moderate to difficult and PCB students found Mathematics portion to be moderately difficult. The overall difficulty level of the IISER Entrance Exam 2025 was found to be moderate.
Equal distribution of subjects and topics was found in the exam. Both the practical and theory-based questions were asked by the exam officials. Many of the students found the physics section as the most difficult section to attend.
IISER 2025 Exam Difficulty Level
Candidates can check out the IISER 2025 exam difficulty level from here:
| Subject |
Difficulty Level |
Good Attempt |
|---|---|---|
| Biology |
Easy |
12-13 Questions |
| Physics |
Moderate to Difficult |
8-10 Questions |
| Chemistry |
Moderate |
10-12 Questions |
| Mathematics |
Easy to Moderate |
10-12 Questions |
When will IISER 2025 Answer Key Releasing?
IAT 2025 Answer Key will be released anytime soon today, May 25, 2025. At first, the exam officials will release the IISER provisional answer key 2025. Test takers will get the opportunity to raise objections against the released IISER answer key 2025. Students response sheet for IISER exam 2025 will be released on the official website in the mean time. The IAT 2025 answer key objection fee to submit an objection against each answer key will be notified soon. The IAT final answer key 2024 will be released in the forst week of June 2025.
IISER 2025 Expected Cut Off
IAT 2025 candidates' ranks will be based on their combined scores from the four sections (Physics, Chemistry, Mathematics and Biology). The exam comprises 60 questions with a total score of 240 marks. Below is a table for the expected IISER 2025 ranks corresponding to different score ranges.
| IISER 2025 Score (Out of 240) |
Expected IISER 2025 Rank |
|---|---|
| 200 and above |
Rank 1 to 80 |
| 200-160 |
Rank 81- 200 |
| 160- 110 |
Rank 201 to 800 |
| 110-95 |
Rank 800 to 1500 |
| 95-75 |
Rank 1500- 2000 |
| < 60 |
Above 2000 |
IISER Entrance Exam 2025: Good Attempts and Safe Score
Check out the number of good attempts for each subject, the time spent on each section and the safe score details from below:
| Subject | Questions | Maximum Marks | Attempt Questions | Time Spent | Safe Score |
|---|---|---|---|---|---|
| Mathematics | 15 Questions | 60 | 12 Questions | 55 minutes | 44 |
| Physics | 15 Questions | 60 | 12 Questions | 50 minutes | 47 |
| Chemistry | 15 Questions | 60 | 13 Questions | 40 minutes | 47 |
| Biology | 15 Questions | 60 | 13 Questions | 25 minutes | 50 |
| Buffer | Recheck | 10 minutes | |||
| Total | 60 Questions | 240 Marks | 48 Questions Correct 4 Questions Wrong |
180 minutes | 188 |
IISER Pune cutoff 2024 has been released across BS and BS-MS specialisations. The last-round seat allotment for IISER Pune conclued at 1023 for all BS-MS Specialisations under the General AI category. Comparing to IISER Pune cutoff 2022, the cutoff has been improved with an increase in the ranks in 2024.
Further, IISER Pune SC AI category cutoff 2024 has been concluded at 340 for all BS-MS specialisations. Candidates seeking admission to IISER Pune can check out the cutoffs given below:
| Course | 2022 | 2024 |
|---|---|---|
| B.S. in Biological Science + M.S. in Biological Science | 319 | 1023 |
| B.S. in Chemical Sciences + M.S. in Chemical Sciences | 319 | 1023 |
| B.S. in Physical Sciences + M.S. in Physical Sciences | 319 | 1023 |
| B.S. in Mathematical Sciences + M.S. in Mathematical Sciences | 319 | 1023 |
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Check out the last minute preparation tips on IISER entrance exam from here:
1. Focus on Key Topics
Prioritize the most scoring and frequently asked topics from each subject:
Maths: Calculus, Algebra, Trigonometry, Coordinate Geometry
Physics: Mechanics, Electricity & Magnetism, Modern Physics
Chemistry: Physical Chemistry (especially mole concept, chemical kinetics), Organic reaction mechanisms, Periodic Table trends
Biology: Cell biology, Genetics, Evolution, Ecology, Human Physiology
2. Revise NCERTs Thoroughly
NCERT books (especially for Biology and Chemistry) are crucial. Stick to them in the final stretch.
Re-read summaries and solved examples.
3. Practice Previous Year Papers & Mock Tests
Take at least 1 full-length mock test daily in exam-like conditions.
Analyze your mistakes and avoid repeating them.
Time management is key—learn which questions to skip.
4. Use Short Notes & Formula Sheets
Go through your short notes and formula sheets daily.
Avoid opening new books or resources now.
5. Time Allocation Strategy
During the exam:
Target your stronger sections first to boost confidence.
Keep an eye on the clock—don't get stuck on any one question.
6. Stay Calm & Take Care of Yourself
Get proper sleep (7–8 hours), especially before the exam.
Stay hydrated and eat light, nutritious food.
Don't panic—trust your preparation.