IISER is set to conduct the IISER Aptitude test tomorrow, May 25, 2025, at various exam centres nationwide to test candidates domain knowledge in Mathematics, Physics, Chemistry and Biology. Test takers can take the IAT 2025 exam in one shift, i.e., morning shift from 9 am to 12 pm. Read this Shiksha article to learn about the IAT 2025 exam pattern, shift timings, marking scheme and important events about the IISER entrance exam 2025.
IISER 2025 Shift Timings, Exam Pattern and Marking Scheme
IISER Aptitude Test 2025 will be held nationwide on May 25, 2025 at various exam centres. The exam will be held for the aspirants who wish to do 5-year BS-MS dual degree programme or BS degree programme and BTech from IISER institutions, IISc Bangalore and IIT Madras. Candidates will take the IISER exam 2025 to test their domain knowledge in Mathematics, Physics, Chemistry and Biology. The exam official will be asking 16 questions from each section.
The IAT 2025 exam will be held in one shift. The morning shift will start from 9 am to 12 pm. A total of three hours or 180 minutes will be given to the test takers to attempt the 60 questions asked in the examination. There will be only 60 multiple-choice questions (MCQs) that the exam authority will ask from the mentioned IISER syllabus 2025.
IISER Entrance Exam 2025 Marking Scheme
The IISER Entrance Exam Marking Scheme is as follows:
| Subject |
No. of Questions |
Marks |
|---|---|---|
| Physics |
15 |
60 |
| Chemistry |
15 |
60 |
| Biology |
15 |
60 |
| Mathematics |
15 |
60 |
| Total |
60 |
240 |
Marking scheme: Candidates will be awarded three marks for each correct answer. There will be negative marking of one mark for each incorrect answer.
IISER 2025 Reporting Timings
The IISER exam 2025 shift-wise reporting timings are given in the below table:
| Dates of Examination |
May 25, 2025 |
| Mode of Examination |
“Computer Based Test (CBT)” mode only |
| Shift |
Shift-1 |
| Timing of Examination |
9:00 AM to 12:00 PM |
|
Duration of Examination |
180 Minutes or 3 hours |
| Entry in the Examination Centre/Hall/Room, frisking, biometric registration/ record of manual attendance by Invigilator, document verification/cross-checking of Admit Card, signature, and photo match to be completed by Invigilator, etc. Instructions by the Invigilator(s) |
07.00 a.m. to 08.30 a.m. |
|
07.00 a.m. to 08.30 a.m. |
|
| Candidates log in to read instructions |
08.50 a.m. |
| Test Commences |
09.00 a.m. |
| Test Concludes |
12:00 p.m |
IISER Entrance Exam Important Dates
Candidates can go through the IAT 2025 exam and admission process timeline from here:
| Event Name |
Date |
|---|---|
| IISER Admit Card 2025 |
May 15, 2025 |
| (i) IISER Aptitude Test (ii) Answer Key display |
May 25, 2025 |
| (i) Upload of student's response form (ii) Portal opens for filing objections |
Fourth week of May 2025 |
| Portal closes for filing objections |
Fourth week of May 2025 |
| Display of final answer keys |
First week of June 2025 |
| IAT Results publication |
Second week of June 2025 |
1. Prioritize High-Weightage Topics
Focus on topics that are frequently asked and easier to score. Here's a subject-wise breakdown:
| Physics | Chemistry | Mathematics | Biology |
|---|---|---|---|
|
|
|
|
Read More:
The IISER Entrance Exam Marking Scheme is as follows:
- Physics 15 questions will be asked in the examination and 60 marks will be the maximum awarded for all the correct answers.
- Mathematics- 15 questions will be asked in the examination and 60 marks will be the maximum awarded for all the correct answers.
- Chemistry 15 questions will be asked in the examination and 60 marks will be the maximum awarded for all the correct answers.
- Biology 15 questions will be asked in the examination and 60 marks will be the maximum awarded for all the correct answers. Marking scheme: Candidates will be awarded three marks for each correct answer. There will be negative marking of one mark for each incorrect answer.
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