IISER 2025 Answer Key: IAT Final Answer Key (Released), How to Calculate Score, Response Sheet

Q: When will IAT 2025 Provisional Answer Key Released?

IISER is expected to release the IAT 2024 Exam Answer Key at its official website on May 25, 2025. Candidates who have appeared in IISER Aptitude Test will be able to check their answers marked for the questions asked and can evaluate their final marks scored. Candidates must note that these are not the final answer key that the examination conducting body, IISER released. These are the provisional answer key. Applied candidates will get the opportunity to raise objections if they found any mistakes in the provided answer key.

Q: When will IAT 2025 Provisional Answer Key Released?

IISER is expected to release the IAT 2024 Exam Answer Key at its official website on May 25, 2025. Candidates who have appeared in IISER Aptitude Test will be able to check their answers marked for the questions asked and can evaluate their final marks scored. Candidates must note that these are not the final answer key that the examination conducting body, IISER released. These are the provisional answer key. Applied candidates will get the opportunity to raise objections if they found any mistakes in the provided answer key.

426 Students Q&A

Updated on Sep 16, 2025 11:27 IST

By Ishita Chauhan, Retainer

IISER 2025 final answer key was released on June 24, 2025. The exam officials will publish the IAT 2025 final answer key based on the corrections make against the objections received by the test takers in the released provisional answer key. The IISER 2025 scorecard will be based on the final answer key released. Candidates can no longer raise objections against the final answer key.

IISER results 2025 were released on June 24, 2025. The results will be based on the IAT final answer key 2025. IISER 2025 students' response sheet was released on the official website on May 29, 2025. IAT 2025 Answer Key was released on the official website on May 25, 2025, for the candidates taking admissions to the BS-MS/ BS degree programmes.

Take a look at the details of the IISER answer key dates, download and challenge process and other related information. The IAT 2025 counselling will start in the third week of June 2025 to freeze the seats offered at various IISER institutes.

Latest Updates:

Table of content

Direct Link to IISER Final Answer Key 2025
IISER 2025 Important Dates Table
Steps to Download the IISER 2025 Final Answer Key
How to Calculate Score Based on IISER 2205 Final Answer Key
IISER 2025 Response Sheet
IAT 2025 Answer Key Objection Process
How to Calculate Scores Based on IISER 2025 Answer Keys
IISER Previous Year Answer Key

Direct Link to IISER Final Answer Key 2025

Candidates will be able to download the provisional and final answer key of IISER 2025 pdf from the official website only in online mode. The authorities will release first, the provisional answer key of IISER 2025 exam pdf and candidates will be able to check their answers and calculate the probable scores secured in the IISER exam 2025. To download the IAT answer key 2025, the candidate can download from here:

Download Link-

https://iiseradmission.in/

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

English: Download Now
Hindi: Download Now

Download IAT 2025 Question Paper and Provisional Answer Key Here:

English: Download Now
Hindi: Download Now

Also Read: IISER 2025 Question Paper Analysis

Commonly asked questions

Q: What is the official website for downloading IISER entrance exam 2025 result?

IISER Entrance exam 2025 results will be announced in the fourth week of June, 2025, tentatively. Test takers who successfully appeared in the IAT 2204 exam will be able to download their score card by visiting the official website of IISER 2025.

The official IISER 2025 link for downloading the IISER Entrance exam result is- iiseradmission.in.

Q: I have forgotten my IISER Entrance Exam application number. What should I do?

You can re-generate your IISER application number by clicking on the Forgot Application link available on the account login window. The steps to get the application number have been given below for the candidates:

a) Go to the application window/result window

b) Click on the forgot application number link

c) Fill out the details asked

d) The application number will be sent to the registered mobile number and email.

Candidates can check out their e-mail where at the time of registration, IAT exam authority must have sent the application number on successful registration.

Q: What are the steps to download IISER answer key?

Candidates will be able to download the final answer key of IISER 2025 pdf from the official website only in online mode. The authorities released the first provisional answer key of IISER pdf and candidates will be able to check their answers and calculate the probable scores secured in the IISER 2025 admission test. To download the IISER answer key 2025, candidates must follow the below steps:

Go to the IISER official website - https://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

View answer key

IISER 2025 Important Dates Table

Take a look at the table below for the complete schedule of IISER Entrance Exam 2025 exam

Dates	Past Exam Dates
16 Aug ' 25 - 19 Aug ' 25	IISER 2025 Round 4 Seat Allotment
08 Aug ' 25 - 12 Aug ' 25	IISER 2025 Round 3 Seat Allotment
01 Aug ' 25 - 05 Aug ' 25	IISER 2025 Round 2 Seat Allotment
View More Past Events (7)

Steps to Download the IISER 2025 Final Answer Key

Go to the IISER official website - https://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

Commonly asked questions

Q: When will IAT 2025 Provisional Answer Key Released?

IISER is expected to release the IAT 2024 Exam Answer Key at its official website on May 25, 2025. Candidates who have appeared in IISER Aptitude Test will be able to check their answers marked for the questions asked and can evaluate their final marks scored. Candidates must note that these are not the final answer key that the examination conducting body, IISER released. These are the provisional answer key. Applied candidates will get the opportunity to raise objections if they found any mistakes in the provided answer key.

Q: When will IAT 2025 Student Response Sheet release?

Indian Institutes of Science Education and Research (IISER), the examination conducting body already released the IISER Aptitude Test (IAT) 2025 Student Response Sheet on second week of June 2025. Candidates can visit the official website of IISER and after logging in with their credentials can finally view their IAT 2025 Response Sheet. Candidates can finally tally up their marks scored in the IISER Aptitude Test which conducted in the first week of June 2025.

Q: When will IISER 2025 Answer Key objection raise window open?

The online window to raise representations about questions/answers in IAT 2025 started on May 29, 2025 from 5 pm onwards. The last date to raise objections will be June 01, 2025 till 5 pm. Candidates need to log in to your account and click on IAT Channel Tab. Then they will be able to see two tabs - "IAT 2025 Objection" tab and "Candidate Response" tab.

Candidates can go through the provisonal answer keys in order to get an estimation of the score that they can obtain in the IISER entrance exam 2025. In case of any discrepancy with respect to any question asked in the exam or its answer, candidates can raise an objection (s) to the exam authorities in the prescribed format. If the raised objection is successful, a final IISER entrance exam 2025 answer key will be released with all the required modifications.

How to Calculate Score Based on IISER 2205 Final Answer Key

The IISER 2025 score is evaluated based on the IISER 2025 examination marking scheme. IAT 2025 Results will be compiled based on the corrections made in the provisional answer key (also called IAT Final answer key). According to the IAT 2025 exam pattern, the candidates must remember the following marking scheme while calculating IAT 2025 score:

The marking scheme of the IAT 2025 is as follows:

Each question carries four marks.
For each correct response, candidates will get four marks.
For each incorrect answer, one mark will be deducted from the total score.
Unanswered/un-attempted answers will be given no marks.

Commonly asked questions

Q: When will IISER 2025 Answer Key objection raise window open?

Q: When will IAT 2025 Provisional Answer Key Released?

IISER 2025 Response Sheet

The exam officials will display the recorded responses and Question Paper attempted by the candidates on the official website before the declaration of the result/Score. The recorded responses are likely to be displayed for two to three days.

Direct Link to Download IAT 2025 Student Response Sheet- https://iiseradmission.in/

How to Download IISER Exam 2025 Student Response Sheet?

Candidates can follow the step-by-step procedure mentioned below to know how to download the IISER Exam response sheet 2025:

Candidates need to visit the official website of IISER Exam 2025 first or can also check the release information by visiting the official website.
Next, log in their registered account on the IISER Exam 2025 official website by filling in their application ID and date of birth.
Candidates can now see the IISER Exam response sheet 2025 on the screen.
Candidates can download the IISER Exam 2025 response sheet PDF from there.

IAT 2025 Answer Key Objection Process

IAT 2025 Objection Raise Window: The online window to raise representations about questions/answers in IAT 2025 will be opened soon. Candidates need to log in to their account and click on the IAT Channel Tab. Then they would be able to see two tabs - "IAT 2025 Objection" tab and "Candidate Response" tab. Candidates can go through the provisional answer keys in order to get an estimation of the score that they can obtain in the IISER entrance exam 2025.

In case of any discrepancy with respect to any question asked in the exam or its answer, candidates can raise an objection(s) to the exam authorities in the prescribed format. The last date for raising the IAT 2025 answer key objections will be notified soon. If the raised objection is successful, a final IISER entrance exam 2025 answer key will be released with all the required modifications.

After submitting the appropriate answers with proof and if found the correct. Candidates can get marks for that answer. IISER entrance exam answer keys contain correct answers for all questions asked in the written test. Aspirants who have taken the exam will get the opportunity to file objections against the answer key. The final answer key will be made available on the official website in the first week of June 2025.

How to Calculate Scores Based on IISER 2025 Answer Keys

Candidates will 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

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

IISER Entrance Exam Exam

Student Forum

Anything you would want to ask experts?

Write here...

My IAT SC rank is 7000, can I get any IISER?

Answered 2 months ago

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).

PRINCE MISHRA

Contributor-Level 7

How much rank should I score to get IISER Berhampur?

Answered 2 months ago

IISER Berhampur cutoff 2025 for the BS + MS course across multiple specialisations stood at 3299 during the Round 1 cutoff for the students belonging to the General AI quota. So, considering the first-round cutoff rank, candidates must target to secure a rank up to 3299 and lower to improve their ch

Rashmi Sinha

Contributor-Level 10

What is the IISER Mohali category-wise cutoff for BS + MS?

Answered 2 months ago

IISER Mohali cutoff 2025 has been released for different categories of students under the AI quota. For the General category, the cutoff rank for BS + MS admission across multiple specialisations was 1778. To view the category-wise ranks, refer to the table below: