CSIR NET 2025 Exam was conducted successfully from 28th July 2025 by the National Testing Agency (NTA). Covering five major science subjects, the exam followed the same structure as previous years. Candidates across the country appeared in Computer-Based Tests (CBT) held in two shifts on a single day.
This detailed analysis will help students understand the difficulty level, section-wise performance, number of good attempts, and the marking scheme for each subject: Physical Science, Life Science, Mathematical Science, Earth Science, and Chemical Science.
Also Check CSIR NET Question Paper 2025
CSIR NET Exam Analysis 2025 Overview
The CSIR NET 2025, conducted by the National Testing Agency (NTA) from 28th July 2025, provided a comprehensive assessment of candidates’ understanding across core science subjects. The exam followed the traditional pattern, held in two shifts on a single day and covering five major subjects: Physical, Life, Earth, Mathematical, and Chemical Sciences.
| Particulars | Details |
| Exam Name | CSIR NET December 2025 |
| Conducting Body | National Testing Agency (NTA) |
| Exam Mode | Online (Computer-Based Test) |
| Exam Dates | 28 July 2025 |
| Duration | 3 Hours |
| Shifts | Shift 1: 9 AM–12 PM, Shift 2: 3–6 PM |
| Total Marks | 200 |
| Question Type | Multiple Choice Questions (MCQs) |
| Medium of Exam | English and Hindi |
| Subjects | Earth, Chemical, Life, Math, Physical Sciences |
| Official Website | csirnet.nta.ac.in |
Also Check CSIR NET Life Science Question Paper 2025
Subject-Wise CSIR NET Exam Analysis 2025
Let’s break down how each subject paper was structured, what students experienced, and what counts as a good attempt in each.
CSIR NET Physical Science Exam Analysis 2025
The Physical Science paper was concept-heavy with a mix of easy and tricky questions. Part A (aptitude) was generally easier, while Parts B and C tested deeper understanding and analytical skills. Part C included lengthy numerical problems.
| Section | Total Questions | Attempt Limit | Good Attempts | Difficulty |
| Part A | 20 | 15 | 10–13 | Easy to Moderate |
| Part B | 25 | 20 | 15–17 | Moderate |
| Part C | 30 | 20 | 11–17 | Moderate to Difficult |
| Total | 75 | 55 | 37–43 | Moderate |
Also Check CSIR NET Previous Year Questions
CSIR NET Life Science Exam Analysis 2025
The Life Science paper had a balanced mix of conceptual and data-driven questions. While Part A was relatively simple, Parts B and C demanded better subject clarity.
| Section | Total Questions | Attempt Limit | Good Attempts | Difficulty |
| Part A | 20 | 15 | 11–13 | Easy to Moderate |
| Part B | 50 | 35 | 22–29 | Moderate |
| Part C | 75 | 25 | 17–20 | Moderate |
| Total | 145 | 75 | 50–62 | Moderate |
CSIR NET Mathematical Science Exam Analysis 2025
Time management played a crucial role in this paper. While Part A was the most approachable, Part C contained lengthy calculations that required precision and speed.
| Section | Total Questions | Attempt Limit | Good Attempts | Difficulty |
| Part A | 20 | 15 | 11–13 | Easy to Moderate |
| Part B | 40 | 25 | 21–22 | Moderate |
| Part C | 60 | 20 | 13–15 | Moderate |
| Total | 120 | 60 | 50–53 | Moderate |
Also Check the CSIR NET Cut Off
CSIR NET Earth Science Exam Analysis 2025
This paper included a blend of factual and conceptual questions, especially in Parts B and C. Students found Part B relatively tougher, while Part A remained manageable.
| Section | Total Questions | Attempt Limit | Good Attempts | Difficulty |
| Part A | 20 | 15 | 12–13 | Easy to Moderate |
| Part B | 50 | 35 | 25–31 | Moderate to Difficult |
| Part C | 80 | 25 | 18–22 | Moderate |
| Total | 150 | 75 | 55–66 | Moderate |
CSIR NET Chemical Science Exam Analysis 2025
The Chemical Science paper was well-balanced with a combination of theory and application. Part C involved analytical thinking, while Part B was mostly conceptual.
| Section | Total Questions | Attempt Limit | Good Attempts | Difficulty |
| Part A | 20 | 15 | 10–12 | Easy to Moderate |
| Part B | 40 | 35 | 25–32 | Moderate |
| Part C | 60 | 25 | 17–20 | Easy to Moderate |
| Total | 120 | 75 | 60–63 | Easy to Moderate |
CSIR NET 2025 Marking Scheme (Subject-wise)
Each subject in CSIR NET has its own marking scheme, especially for incorrect responses. Here’s how marks were awarded and deducted:
| Subject | Total Marks | Negative Marking | Positive Marking |
| Mathematical Sci. | 200 | A: –0.5, B: –0.75, C: 0 | A: +2, B: +3, C: +4.75 |
| Physical Science | 200 | A: –0.5, B: –0.875, C: –1.25 | A: +2, B: +3.5, C: +5 |
| Chemical Science | 200 | A: –0.5, B: –0.5, C: –1 | A: +2, B: +2, C: +4 |
| Earth Science | 200 | A: –0.5, B: –0.5, C: –1 | A: +2, B: +2, C: +4 |
| Life Science | 200 | A: –0.5, B: –0.5, C: –1 | A: +2, B: +2, C: +4 |
CSIR NET Exam Analysis 2025 FAQs
What are considered good attempts in CSIR NET 2025?
Good attempts vary by subject but typically range between 50 to 65 correct answers, depending on accuracy.
Which section was easiest across all subjects in CSIR NET Exam 2025?
In the CSIR NET Exam 2025, Part A (General Aptitude) was generally the easiest in all subjects.
Is there negative marking in CSIR NET 2025?
Yes, except for Part C of Mathematical Science. The penalty varies by subject and section.
What is the exam mode of CSIR NET 2025?
The exam was conducted online in CBT (Computer-Based Test) mode across two shifts per day by NTA.
