IISER Mohali All Questions

Hello,

Yes, Maths is compulsory for IISER admission .

To apply through the IISER Aptitude Test (IAT), you must have studied Mathematics in Class 12. Even if you are from a PCB stream, you cannot apply without Maths.

Hope it helps !

Hey! If you are planning to appear for the IISER exam (IAT) in 2026, here are some important points:

Eligibility: You should have passed Class 12 in 2024/2025 or be appearing in 2026, with Physics, Chemistry, Mathematics or Biology as your main subjects.

Exam Pattern: The paper is called IISER Aptitude Test (IAT). It has 60 questions (15 each from Physics, Chemistry, Maths, and Biology). Duration is 3 hours, with +4 marks for correct and −1 for wrong answers.

Admission: From 2024 onwards, admission is only through IAT score. JEE Advanced and KVPY are no longer considered.

Application Timeline: Notification usually comes around February, and applications are expected in March–April 2026.

My suggestion: Start preparing with NCERTs and practice mock tests regularly. Keep checking the official IISER admission website for exact updates.

Since you’ve cleared the IISER Aptitude Test, you now need to register online for the counselling at the official portal (iiseradmission.in). Fill out the preference form with your IISER choices, verify documents if shortlisted, and pay the seat acceptance fee. Keep checking the site for counselling dates and steps.

If you see last year data the closing rank for SC at the least competitive IISER Berhampur in 2024 was 965. It shows that even for newer and less competitive IISERs, the closing ranks for the SC category were far below 8000. So unfortunately possibility is very low.

Good luck..

Hello,

If your OBC-NCL certificate is valid, issued after April 1st, digitally signed, has a QR code, and mentions all the required details, then there should not be any problem.

Even if the format is slightly different, the main thing is that it proves your OBC-NCL status under the central list. Also, since the IISER help desk has confirmed that uploading a valid document before the deadline is fine, your reservation is not likely to be cancelled.

Hope it helps !

If your OBC-NCL certificate includes all required details like caste, non-creamy layer status, and income limit, it should generally be accepted.
Even though it’s in your state’s format, IISER mainly checks whether it meets central guidelines.
Sometimes, they may still ask you to upload it in the Central Government format later.
To be safe, keep a copy ready in the prescribed central format if possible.
This way, you won’t face any issues during final document verification.

Dear aspirant,

You can find the IAT IISER previous year question papers on the official IISER admission website . Or you can also download the official question paper PDF of 2025, and also the previous years question papers from the links attached below. Please visit these links.

https://engineering.careers360.com/articles/iat-previous-year-question-paper

https://engineering.careers360.com/articles/iiser-question-paper

Dear aspirant,

For IISER 2025, high weightage topics include atomic structure, chemical bonding, Thermodynamics, equilibrium, and coordination compounds in chemistry . In physics - Laws of motion, Thermodynamics, Optics, and modern Physics . In biology - Genetics, Cell biology, and human Physiology . And Calculas, algebra, Coordinate Geometry in mathematics.

For more details please visit this link given below.

https://engineering.careers360.com/articles/iiser-syllabus-exam-pattern

HELLO,

Yes, you can attempt the IISER aptitude exam (IAT) even with a 53% in your 12th board exams as long as you have applied and the results are not yet declared. However your admission will be subject to fulfilling the minimum eligibility criteria of the specific IISER you are applying to which typically requires a minimum aggregate percentage. You can check the eligibility criteria for the IISER you are interested in.

Hope this Helps!

Hello aspirant,

Candidates for the IISER Aptitude Test (IAT) must have completed a minimum of three physics, chemistry, math, and biology courses in Class XII.  Individual subjects do not have a set cut-off.

For complete information, you can visit our site through following link:

https://engineering.careers360.com/articles/iiser-syllabus-exam-pattern

Thank you