IISER Answer Key 2026 (OUT): Answer Key Download Link & Response Sheet Details

Indian Institutes of Science Education and Research Entrance Exam 2026 ( IISER Entrance Exam )

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Objection

9 Jun '26 - 13 Jun '26

Vikash Kumar Vishwakarma
Updated on Jun 10, 2026 11:54 IST

By Vikash Kumar Vishwakarma

Overview

IISER 2026 answer key objection portal was activated on June 9, 2026. The link to challenge the IAT answer key 2026 is updated on the website, iiseradmission.in. Candidates can submit their objections by June 13, 2026. The authority had released the answer key on June 7, 2026. Students can use the IISER 2026 response sheet and answer key to cross-check their answers.

The final answer key for IAT 2026 will be released online after verifying the objections. If the objection is accepted, then a revised answer key PDF will be released online. IISER 2026 exam was conducted on June 7, 2026. Check the page for more information on IISER 2026 answer key.

Latest: Direct Link for Candidates Response Portal for IAT 2026

Table of contents
  • How to download the IISER Answer Key 2026?
  • IISER 2026 Important Dates Table
  • IAT 2026 Answer Key Objection Process
  • How to Calculate IISER Exam Marks
  • IISER 2026 Response Sheet
  • IISER 2026 Marks vs Rank
  • IISER Previous Year Official Answer Key PDFs
  • IISER 2026 Cutoff
  • IISER Previous Year Answer Key
View More
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How to download the IISER Answer Key 2026?

The authority has uploaded the IISER answer key pdf online. Candidates can download the IAT answer key 2026 through the online application portal. The answer key is available along with the candidate's digital response. The process to download the IISER 2026 answer key is mentioned below.

  • Go to the IISER official website, iiseradmission.in/

  • Click on the ‘IISER answer key” link.

  • Enter application number (roll number) and password.

  • The answer key of IISER was displayed on the screen.

  • Take a print out of the answer key and save it for future reference.

Direct Link for IISER 2026 Answer Key

IISER 2026 Important Dates Table

Take a look at the table below for the complete schedule of IISER Entrance Exam 2026 exam

DatesUpcoming Exam Dates
09 Jun ' 26 - 13 Jun ' 26

Objection

ONGOING
DatesPast Exam Dates
07 Jun ' 26 - 09 Jun ' 26

Provisional Answer Key

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IAT 2026 Answer Key Objection Process

The authority activated the IISER answer key objection window on June 9, 2026. The link to challenge the answer key is available on the website iiseradmission.in. Candidates have to login through online application portal of IAT and submit their challenge (if applicable). This is a chargeable process, and candidates have to pay for each object. They have to pay INR 100 per objection. The process to challenge the IISER answer key is mentioned below.

  • Go to IISER 2026 admission website.
  • Click on IAT answer key objection link
  • Now click on the 'Candidates response and objection portal' link
  • Click on the login link.
  • Enter the user id and password.
  • Click on Objection form.
  • The form will open. Now students have to click on fill the form link.
  • Fill all sections and submit it.
  • After submission, students need to pay the objection fees.
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How to Calculate IISER Exam Marks

Candidates have to calculate their estimated scores based on the following method:

  • For each correct answer, add four marks

  • For each wrong answer, deduct one mark

  • No marks will be awarded for unattempted questions

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IISER 2026 Response Sheet

The authority released the IISER response sheet 2026 on June 9. Candidates can download the IAT response sheet through the login portal. The response sheet is the digital copy of candidates' responses. They can use the response sheet to cross check their using the IISER answer key 2026. The process to download the IAT response sheet is mentioned below.

  • Go to the IISER 2026 website
  • Click on the IAT response sheet link
  • Enter the user id and password. 
  • The response sheet will display on the screen.
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IISER 2026 Marks vs Rank

Candidates can check IISER marks vs rank to know their rank based on marks obtained in the exam. The higher the marks, the higher the rank. Students must try to score 150+ marks to secure the top rank in IISER. Here we have mentioned the expected IISER marks vs rank.

IISER 2026 Score (Out of 240) Expected IISER 2026 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

Also Read: IISER 2026 Marks vs Rank 

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IISER Previous Year Official Answer Key PDFs

DeskCalendarAnswer Key: 09 Jun ' 26 - 13 Jun ' 26

Candidates can find the link to the IISER previous year answer key pdf here. The answer key is available with the IISER question paper. Students solving the previous year's questions can use the answer key to cross-check their responses and focus on weaker topics.

Download IAT 2025 Final Question Paper and Answer Key Here: Download Links

Download IAT 2025 Question Paper and  Provisional Answer Key Here: 

Also Read: IISER 2026 Question Paper Analysis 

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IISER 2026 Cutoff

IISER cutoff 2026 will be released online. The cutoff is the minimum rank required for admission to the participating IISER. Students whose rank in IISER is within the closing cutoff will be considered for admission. IISER cutoff 2026 will vary for each category. The authority will consider various factors, like exam difficulty level, number of students qualified in the test, and total number of seats available, to prepare the cutoff rank.

Also Read: IISER Counselling 2026 

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IISER Previous Year Answer Key

IISER Entrance Exam 2023 Final answer key was released by the conducting body on June 28, 2023. IAT 2023 final answer key was the same as of IISER Provisional answer key. The only difference that the candidate will find in the IAT 2023 answer key is the solution to the Question No 14 of Chemistry subject.

For better understanding, candidates can view the question and the answer also which is specified in the final answer key. The rest of the answers are the same as of provisional answer key.

Question 14
In two solutions X (hexane and benzene) and Y (water and HCl), what types of deviations from Raoult’s law are observed?
(a) CORRECT ANSWER No deviation (ideal behaviour) and negative deviation, respectively.
(b) Negative deviation and positive deviation, respectively.
(c) CORRECT ANSWER  Positive deviation and negative deviation, respectively.
(d) Positive deviation and no deviation (ideal behaviour), respectively.

Indian Institutes of Science Education and Research (IISER), the examination conducting body released the IISER Aptitude Test (IAT) 2023 Student Response Sheet on June 20, 2023. Candidates could visit the official website of IISER and after logging in with their credentials can finally view their IAT 2023 Response Sheet. 

IISER candidates can download the provisonal answer key in both the hindi and english languages separately here:

IISER 2023 Answer key_English

IISER 2023 Answer key- Hindi

 

 

Read more

11 Institutes accepting IISER Entrance Exam

B.S. in Biological Science
  • 8.00 Lakh
  • 4 years
  • |
  • Full Time
B.S. + M.S.
  • 3.56 Lakh
  • 5 years
  • |
  • Full Time
B.Sc. in Biotechnology
  • 6.00 Lakh
  • 3 years
  • |
  • Full Time

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