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IISER IAT Previous Year Question Papers (2017–2026)

Every IISER Aptitude Test paper from 2017 to 2026 in one place — free year-wise PDFs plus the official answer keys published by IISER. Use them with the exam pattern and practice plan below to build real IAT exam temperament.

Year-wise IAT papers & answer keys

IISER IAT question papers from 2017 to 2026 with answer keys — free PDF downloads across Biology, Chemistry, Mathematics and Physics.

IAT 2026 Question Paper & Official Answer Key

2 downloads · question paper & answer key

IAT Question Paper 2025

1 download · question paper & answer key

  • IISER Question Paper 2025 with Answer Key

    Download PDF Detailed Solutions · Paid Students

IAT Question Paper 2024

1 download · question paper & answer key

  • Download IISER Question Paper 2024

    PDF Link Detailed Solutions · Paid Students

IAT Question Paper 2023

1 download · question paper & answer key

  • Download IISER Question Paper 2023

    PDF Link Detailed Solutions · Paid Students

IISER Question Paper 2022

1 download · question paper & answer key

  • Download IAT Question Paper 2022

    PDF Link Detailed Solutions · Paid Students

IISER Question Paper 2021

1 download · question paper & answer key

  • Download IAT Question Paper 2021

    PDF Link Detailed Solutions · Paid Students

IISER Question Paper 2019

1 download · question paper & answer key

  • Download IAT Question Paper 2019

    PDF Link Detailed Solutions · Paid Students

IISER Question Paper 2018

1 download · question paper & answer key

  • Download IAT Question Paper 2018

    PDF Link Detailed Solutions · Paid Students

IISER Question Paper 2017

1 download · question paper & answer key

  • Download IAT Question Paper 2017

    PDF Link Detailed Solutions · Paid Students

Official source: iiseradmission.in

IAT exam pattern & marking scheme

Sections
Biology, Chemistry, Mathematics, Physics
Questions
60 in total — 15 per subject
Total marks
240
Duration
3 hours
Marking
+4 for a correct answer, −1 for an incorrect answer
Mode
Computer-based test (CBT)

Always confirm the current pattern on the official IISER admissions portal before your attempt.

How to practise IAT papers

  • Attempt the last five papers full-length in a single 3-hour sitting, in the same slot time as your exam.
  • Mark every question you guessed — with −1 negative marking, guess-control decides your score more than speed.
  • After each paper, tag mistakes as concept gap, calculation slip or misread, and revise only the concept-gap chapters.
  • Use older papers (2017–2021) chapter-wise while you finish the NCERT syllabus.
  • Re-attempt each paper once more after two weeks and compare accuracy, not just marks.

IISER IAT PYQ — frequently asked questions

Where can I download IISER IAT previous year question papers?

Every IAT paper from 2017 to 2026 is listed year-wise on this page as a free PDF download, with the official answer key links published by iiseradmission.in.

How many years of IAT papers should I solve?

Solve the last five years first under a strict 3-hour timer, then work backwards through the older papers chapter-wise. Repeat questions and question styles are common in Biology and Chemistry.

Is the IAT syllabus the same as NCERT Class 11 and 12?

Yes. IAT is based on the NCERT Class 11 and 12 syllabus for Biology, Chemistry, Mathematics and Physics, which is why NEET and JEE aspirants can prepare for IAT alongside their main exam.

Are detailed solutions available for IAT papers?

Question papers and official answer keys are free for everyone. Fully worked, step-by-step solutions and mentor-guided paper analysis are part of Prepkunj's paid IISER IAT programmes.

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IISER Self-Study Notes

Chapter notes and chapter-wise tests, free after registration.

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