Which was the toughest section in IISER Entrance Exam 2025?
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2 Answers
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According to the IISER Entrance Exam 2025 analysis, Physics was the toughest section of the exam. The overall difficulty level ranged from moderate to tough. The topics covered in the question papers were Electricity and Magnetism, Mechanics, Optics and Modern Physics. The questions were distributed from the syllabus and included both Class 11 and 12 chapters.
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Hi.
Section‑wise Difficulty in IISER IAT 2025
Physics
Many students and analysts reported that Physics was the most difficult section of the exam in 2025, with application‑based and concept‑heavy questions, especially in topics like electricity and other core areas.
Mathematics
Mathematics was often seen as moderate to challenging, especially for students from biology (PCB) backgrounds, though overall it was slightly easier than Physics according to some reports.
Chemistry
Chemistry was mostly moderate, with a mix of organic, inorganic, and physical questions.
Biology
Biology tended to be the easiest or easy to moderate for mo
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Similar Questions for you
Total marks of the IISER Entrance Exam are 240. The total number of questions in the exam is 60, each carrying four marks. Marks in each section are 15, making the sectional weightage 60. Questions are asked on Physics, Chemistry, Biology and Mathematics. In case of a wrong answer, there will be a deduction of one mark. The structure of the exam is given below.
Subject | No. of Questions | Marks |
|---|---|---|
Physics | 15 | 60 |
Chemistry | 15 | 60 |
Biology | 15 | 60 |
Mathematics | 15 | 60 |
Total | 60 | 240 |
There is no age limit to apply or appear for the IISER Entrance Exam 2026. However, applicants must have appeared for their Board examination in 2024, 2025 or 2026. Based on this, applicants must apply for the exam. Apart from this, students should have studied Physics, Chemistry, Biology and Mathematics in Classes 11 and 12. They have to secure a minimum aggregate percentage of 60 (Unreserved categories) and 55 (Reserved categories) in their Class 12 Board exam or equivalent.
IISER Entrance Exam is conducted for admission to the 5-year BS MS programme offered at the seven Indian Institutes of Science Education and Research. Apart from that, the IISER Aptitude Test scores are also accepted by IISc Bangalore for the 4-year BS course and for the BS - Medical Sciences and Engineering programme at IIT Madras. Apart from this, other courses at IISERs for which the entrance exam scores are accepted are given below.
- 5-Year BS-MS in Computational and Data Sciences at IISER Kolkata
- 4-Year BS in Economic Sciences at IISER Bhopal
- 4-Year BS in Economic and Statistical Sciences at IISER Tirupati.
The IISER entrance exam 2026 application process is likely to begin in the third week of March 2026. The mode of the application process is completely online. Students have to visit the exam portal to fill and submit the form. Along with entering the mandatory information, they also need to upload documents such as photograph, signature or category certificates in the requisite format and dimensions. The last and final step is to pay the category-wise application fee in online mode.
With a 7,000 rank in the SC category, admission to any IISER (including newer campuses) is not possible as per 2025 cutoffs. Cutoff ranks for SC category in IISERs generally close between 125 (most competitive) and 750 (least competitive).
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