National Testing Agency (NTA) has scheduled the CSIR UGC NET December 2025 exam for 18th December 2025 (Thursday), and the examination will be conducted in 225 cities across India. The exam is conducted twice a year in June and December. For the December cycle, CSIR NET Answer Key 2025 is expected to be released 2-3 days after the completion of exam, i.e. in the third week of December 2025.
CSIR NET Answer Key 2025
CSIR NET December exam will be conducted online as a Computer-Based Test (CBT), and according to previous data, lakhs of candidates appear every year across five subjects, Earth, Atmospheric, Ocean, and Planetary Sciences; Chemical Sciences; Life Sciences; Mathematical Sciences; and Physical Sciences.. Candidates will download the CSIR NET Answer Key 2025 from csirnet.nta.ac.in and raise objections, if find any mistakes, within the given time by paying Rs. 200 per question.
CSIR UGC NET Answer Key 2025
A final CSIR NET Answer Key 2025 will be released after reviewing all the objections, and it will be used to prepare the final result. Joint CSIR UGC NET is a national-level exam conducted twice a year to determine the eligibility of Indian nationals for Junior Research Fellowship (JRF), Assistant Professor, and admission to Ph.D. In Indian universities and colleges.
| CSIR NET Answer Key 2025- Highlights | |
| Conducting Body | National Testing Agency (NTA) |
| Exam Name | CSIR UGC NET 2025 |
| Post Name | Junior Fellowship (JRF), Lectureship/Assistant Professor, and Ph.D. |
| CSIR NET Answer Key 2025 | 3rd week of December 2025 |
| CSIR NET Exam Date 2025 | 18th December 2025 (Thursday) |
| Mode of Exam | Computer-Based Mode |
| Marking Scheme | Each correct answer in Part A and Part B is awarded 2 marks, while in Part C, correct answers are awarded 4 marks. There is negative marking for incorrect answers in all parts, with a deduction of 25% of the allotted marks for each wrong answer. |
| Official Website | https://csirnet.nta.ac.in/ |
CSIR NET Answer Key 2025 Download Link
The answer key link for the Joint CSIR UGC NET December Examination 2025 will be activated at the official website at www.csirnet.nta.ac. For the convenience of candidates, we will provide the direct link to check the CSIR NET answer key as soon as it is officially released on the website.
Steps to download the CSIR UGC NET Answer Key 2025
Candidates can download their answer key from the CSIR UGC NET official website at www.csirnet.nta.nic.in by following the below step-by-step process.
- Visit the official website of the National Testing Agency (NTA) at https://csirnet.nta.nic.in/.
- On the homepage, look for the “Latest News” section.
- Candidates find a link to download the “Joint CSIR UGC NET December 2025 – Click Here to Answer Key Challenge”. Click on that link.
- Candidates are redirected to a new page. Here, candidates need to log in by entering their application number and date of birth.
- Enter the Security Pin as shown in the image and click on the Submit tab.
- After successfully logging in, the answer key appears on the screen.
- Download the answer key and calculate your estimated score.
Details Mentioned on CSIR NET December Answer Key 2025
The following details are mentioned in the CSIR UGC NET Answer Key 2025.
- Exam Name
- Exam Date
- Exam Shift
- Exam Subject Name
- Exam Subject Code
- Question IDs
- Correct Option IDs
CSIR NET Raise Objection Link 2025
Candidates who identify discrepancies or have objections to any answers in the provisional key will challenge the answer key from the given dates. Along with the objection, candidates have to pay a non-refundable Rs. 200/- per question. The fee will be paid online through Credit Card, Debit Card/ Net Banking/ UPI payment mode. After reviewing the challenges, the NTA will publish the final answer key.
Steps to Raise Objections to CSIR NET Answer Key 2025
- Go to the official website of the National Testing Agency (NTA) at https://csirnet.nta.ac.in.
- Click on the link that reads “Joint CSIR UGC NET December 2025 – Click Here to Answer Key Challenge”.
- A new login page appears on the screen. Enter your Application Number and Date of Birth. Enter your Security PIN as displayed, then click on the submit button.
- Click on “View Question Paper” for marked responses and to view or challenge the Answer keys.
- You will see Question IDs in sequential order.
- The ID next to the question under the column ‘Correct Option(s)’ stands for the correct Answer Key to be used by NTA.
- If candidates want to challenge this option, they may use any one or more of the Option IDs given
- In the next four columns, by clicking the check box.
- After clicking your desired option, scroll down to ‘Save your Claims’ and move to the next.
- You will see a display of all the Option IDs you have challenged.
- You may want to upload supporting documents in which you can select ‘Choose File’ and upload (all documents are to be put in a single PDF file only)
- Click on ‘Save your Claims and pay fee’ or, in case you want to modify the claims, click on ‘Modify your Claims’.
- After saving the claims, you will find a screen displaying your challenges.
- Kindly pay the fee by clicking on ‘Pay Fee. ’
- The claims will be saved after the successful payment of the required fee.
- Select your Mode of Payment and pay a non-refundable processing fee of Rs. 200/- for each question challenged.
CSIR UGC NET Marking Scheme
The CSIR UGC NET exam consists of multiple-choice questions. The exam is worth a total of 200 marks for each paper. This exam has different subjects with different numbers of questions. However, there is a penalty for wrong answers: 25% of the marks for each incorrect question will be deducted, and this penalty can be as high as 33% in some sections. This system is designed to discourage guessing and ensure that only accurate answers contribute to your final score.
| CSIR UGC NET Marking Scheme | ||
| Subjects and Parts | Marks Allotted For Each Question | Negative Marking |
| Chemical Science | ||
| A | + 2 | – 0.5 |
| B | + 2 | – 0.5 |
| C | + 4 | – 1 |
| Earth Science | ||
| A | + 2 | – 0.5 |
| B | + 2 | – 0.5 |
| C | + 4 | – 1.32 |
| Life Science | ||
| A | + 2 | – 0.5 |
| B | + 2 | – 0.5 |
| C | + 4 | – 1 |
| Mathematical Science | ||
| A | + 2 | – 0.5 |
| B | + 3 | – 0.75 |
| C | + 4.75 | 0 |
| Physical Science | ||
| A | + 2 | – 0.5 |
| B | + 3.5 | – 0.875 |
| C | + 5 | – 1.75 |
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