IISER 2025 Answer Key: IAT Final Answer Key (Released), How to Calculate Score, Response Sheet
Indian Institutes of Science Education and Research Entrance Exam 2026 ( IISER Entrance Exam )
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:
- Direct Link to IISER Final Answer Key 2025
- IISER 2026 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
Answer Key: May ' 26
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-
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
The IISER entrance exam result will be available on iiseradmission.in. The result will be announced in the form of a scorecard or a rank card in PDF format. It will carry subject-wise and overall scores and ranks. The IISER Entrance Exam result will be out tentatively by the fourth week of June 2026. The result should be preserved till the counselling process is over. The scorecards will not be sent through mail.
Candidates will be able to download the answer key PDF of the IISER entrance exam from the exam website. Authorities releases the provisional answer keys and response sheets first, based on which candidates can check the correct answers and calculate probable scores secured in IISER Aptitude test. To download the IISER answer key, candidates can follow the process given below.
Go to IISER website - https://iiseradmission.in/
Click on ‘IISER answer key” link.
Enter application number and password.
Answer key of IISER was displayed on screen.
Take a print out of answer key and save it for future reference
Candidates need to enter application number and password/date of birth as login details to check your IAT result. Other than this security question or captcha that is provided on login page. If you have forgotten your application number then you will need your registered mobile number and email to retrieve application number.
IISER 2026 Important Dates Table
Take a look at the table below for the complete schedule of IISER Entrance Exam 2026 exam
| Dates | Upcoming Exam Dates |
|---|---|
| May ' 26 | IISER Aptitude Test 2026 Provisional Answer Key Release TENTATIVE |
| May ' 26 | IISER 2026 Aptitude Test Answer Key Objection Filing TENTATIVE |
| Jun ' 26 | IISER Aptitude Test 2026 Result TENTATIVE |
| Jun ' 26 | IISER Aptitude Test 2026 Display of Final Answer Keys TENTATIVE |
| Jun ' 26 - Sep ' 26 | IISER 2026 Counselling Process TENTATIVE |
Steps to Download the IISER 2025 Final 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:
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Go to the IISER official website - https://iiseradmission.in/
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Click on the ‘IISER answer key” link.
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Enter application number (roll number) and password.
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The answer key of IISER was displayed on the screen.
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Take a print out of the answer key and save it for future reference
Also Read: IISER Exam 2026
.
Commonly asked questions
IISER is expected to release the IAT 2026 Answer Key in the fourth week of May. Candidates who will appear in the IISER Aptitude Test will be able to check their answers marked for the questions asked and can evaluate their final marks scored. Test takers will get the opportunity to raise objections against the provisional answer keys, in case there is a discrepancy.
Indian Institutes of Science Education and Research (IISER) will release the IISER Aptitude Test (IAT) 2026 Student Response Sheet in the second week of June 2026. Candidates can visit the official website of IISER and, after logging in with their credentials, can finally view their IAT 2026 Response Sheet. Candidates can finally tally up their marks scored in the IISER Aptitude Test.
Candidates will be able to download the answer key PDF of the IISER entrance exam from the exam website. Authorities releases the provisional answer keys and response sheets first, based on which candidates can check the correct answers and calculate probable scores secured in IISER Aptitude test. To download the IISER answer key, candidates can follow the process given below.
Go to IISER website - https://iiseradmission.in/
Click on ‘IISER answer key” link.
Enter application number and password.
Answer key of IISER was displayed on screen.
Take a print out of answer key and save it for future reference
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:
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Each question carries four marks.
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For every right answer, students will get four marks.
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For every wrong answer, one mark will be subtracted from the total score.
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Unanswered/un-attempted answers will be given no marks.
Also Read: IISER 2025 Marks vs Rank
Commonly asked questions
The IISER Entrance Exam 2026 answer key objection submission process is expected to begin in the fourth week of May 2026. The last date is likely to be scheduled in the first week of June 2026. Based on the objections received, the IISER Expert Committee will review the provisional answer keys and release the final answer keys and result, tentatively by the second week of June 2026.
The IISER entrance exam result will be available on iiseradmission.in. The result will be announced in the form of a scorecard or a rank card in PDF format. It will carry subject-wise and overall scores and ranks. The IISER Entrance Exam result will be out tentatively by the fourth week of June 2026. The result should be preserved till the counselling process is over. The scorecards will not be sent through mail.
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.
Also Read: IISER Counselling 2025
Science exams you must check out
Exams for which registrations will start soon
Feb '26 - Apr '26
Feb '26
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 raise objections before the deadline. The final answer key will be made available on the official website in the first week of June 2025.
Also Read: IAT Exam 2025 Cut Off
How to Calculate Scores Based on IISER 2025 Answer Keys
Result: Jun ' 26
Candidates will have to calculate their estimated scores based on the following method:
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For each correct answer, add four marks
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For each wrong answer, deduct one mark
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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 Entrance Exam Exam
Student Forum
Anything you would want to ask experts?Answered Yesterday
There is no fixed number of entering preference for the IISER Entrance Exam counselling process. There are seven IISER institutes offering 11 programmes. Candidates have to select at least one IISER. Higher the number of preferences, better will be their chance of seat allotment.
N
Beginner-Level 5
Answered Yesterday
Once the IISER Entrance Exam counselling seat allotment result is declared, candidates have the following options.
- FREEZE: By selecting this option, candidates confirm the acceptance of the offer, and that they will not participate in the next rounds of IISER Entrance Exam counselling.
- FLOAT: Selecti
V
Beginner-Level 5
Answered Yesterday
Seat Acceptance Fee or SAF is the fee to be paid to accept the allotted seat at a particular round of IISER counselling process. Unless the SAF is paid, candidates will not be considered for admission.
L
Beginner-Level 5
Answered Yesterday
During the IISER Entrance Exam counselling process, seats are allotted based on the following factors.
- Seats available across IISER institutes in the current round of counselling
- IAT Rank obtained by candidates
- IISER preference given by the candidate
- Candidate category.
Candidates are advised to fill as
A
Beginner-Level 5
Answered Yesterday
IISER does not conduct the counselling or admission process for IISc Bangalore and IIT Madras through the IAT scores. These institutes conduct their own counselling or admission process. IISER counselling process is conducted only for seven IISER institutes located across India.
P
Beginner-Level 5
Answered Yesterday
The IISER Entrance Exam counselling process is conducted in online mode. Candidates have to register on the exam website and fill in their institute in course choices in order of preference. Based on that, the seat allotment will be released. They can either 'Freeze' the seat and take admission, or
M
Beginner-Level 5
Answered Yesterday
The IISER entrance exam scores are accepted by 11 IISER institutes across India. Apart from that, IISc Bangalore and IIT Madras also consider the scores for admission to BS courses offered by them.
P
Beginner-Level 5
Answered a week ago
Passed 10+2 from a recognised board in 2024, 2025, or 2026 with minimum 60% marks in aggregate (55% for SC /ST /PwD students) are eligible to apply for IISER exam 2026. Candidates must have taken any three subject among Physics, Chemistry, Mathematics, and Biology in class 12.
V
Contributor-Level 8
Answered a week ago
Indian Institute of Science Education and Research will announce the IISER 2026 exam date on the website, iiseradmission.in/. Students can check the IAT exam date to know the schedule of important events like registration, entrance exam date, admit card, result, and more.
V
Contributor-Level 8
Answered a week ago
No, the admit card for IAT 2026 has not released. The exam authority is expected to release the IISER Aptitude Test admit card 2026 in May 2026. The link to download the admit card will be updated on the IISER admission 2026 website.
V
Contributor-Level 8
10 Institutes accepting IISER Entrance Exam
IIT Madras - Indian Institute of Technology
Adyar, Chennai • Public
- ₹ 8.00 Lakh
- 4 years
- |
- Full Time
IISER Pune - Indian Institute of Science Education &...
Pashan, Pune • Public
4.2- ₹ 3.56 Lakh
- 5 years
- |
- Full Time
IISER Kolkata - Indian Institute of Science Educatio...
Nadia • Public
- ₹ 4.45 Lakh
- 5 years
- |
- Full Time
IISER Bhopal - Indian Institute of Science Education...
Bhopal • Public
- ₹ 3.23 Lakh
- 4 years
- |
- Full Time
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