Complete Guide to science notes for NDA GAT exam 2026

Science constitutes 200 marks of the 600-mark GAT paper in the NDA examination. To succeed, focus on core NCERT concepts from Classes 9-12, emphasizing Physics, Chemistry, and Biology fundamentals. Consistent revision using structured notes, practicing previous year questions, and time-bound mock tests remain the most effective strategy for success.

What is the Exam?

The National Defence Academy (NDA) examination is a prestigious national-level entrance test conducted twice a year by the Union Public Service Commission (UPSC). It serves as the gateway for young aspirants to join the Army, Navy, and Air Force wings of the NDA. The General Ability Test (GAT) is the second part of the written exam, where the Science section plays a pivotal role in determining the final merit list. We at Exam Bhai understand that for many candidates, particularly those from non-science backgrounds, this section can be the deciding factor between clearing the cut-off and falling short.

Key Highlights 2026

• Conducting Body: Union Public Service Commission (UPSC)
• Exam Mode: Offline (Pen and Paper)
• Total GAT Marks: 600
• Science Section Weightage: 200 Marks (50 Questions)
• Marking Scheme: +4 for every correct answer, -1.33 for every incorrect answer
• Level of Difficulty: Class 10th-12th standard (Conceptual focus)

Syllabus 2026

The UPSC does not provide a rigid line-by-line syllabus, but based on past trends, the curriculum focuses heavily on high-school-level scientific principles. Below is the bifurcated breakdown:

Exam Pattern

The GAT paper is designed to test your general awareness and application of science in daily life. When you practice free mock tests for Defence on Exam Bhai, you will notice that the science questions are designed to check conceptual clarity rather than rote memorization.

Eligibility Criteria

According to the official guidelines provided on the UPSC official portal, candidates must meet the following criteria:

• Nationality: Citizen of India, subject of Nepal/Bhutan, or Tibetan refugee.
• Age Limit: Candidates must be between 16.5 and 19.5 years old on the commencement date of the course.
• Educational Qualification:
  • For Army Wing: 10+2 pass from a recognized board.
  • For Air Force and Naval Wings: 10+2 pass with Physics, Chemistry, and Mathematics.

Application Process

The application process is strictly online. Candidates must follow these steps:

1. Visit the official UPSC website.
2. Complete Part I registration (Personal details).
3. Complete Part II registration (Fee payment, center selection, and photo upload).
4. Download the confirmation page for future reference.

Preparation Strategy

We at Exam Bhai recommend a layered approach to your science preparation. Since the science syllabus is vast, prioritize topics with the highest weightage. You can access high-quality study materials for Defence on Exam Bhai to streamline your notes.

Strategy Steps:

• NCERT Mastery: NCERT books are the 'Bible' for the NDA GAT. Ensure you complete the Class 9 and 10 science textbooks thoroughly.
• Conceptual Note-making: Do not copy paragraphs. Create flowcharts for chemical reactions and diagrams for biological processes.
• Application-based Learning: The NDA exam often links science to real-world scenarios. For example, understand why a mirage occurs (Total Internal Reflection) rather than just learning the definition.
• Simulated Testing: Use our tools to evaluate your performance with analytical reports for Defence on Exam Bhai to understand your weak areas in Physics vs. Biology.

Cut-Off Trends

Cut-offs are determined by the UPSC based on the difficulty level and the number of vacancies. Historically, the aggregate cut-off for the written exam fluctuates between 340 and 360 out of 900. Detailed annual cut-off reports can be verified at the UPSC official portal under the 'Examination' tab.

Frequently Asked Questions

1. Are Class 12 Physics topics mandatory for NDA GAT? While the core syllabus is based on Class 10, some questions in Physics touch upon basic Class 11 and 12 concepts like optics and electricity. Focus on the basics first.

2. Is it possible to pass GAT without studying Biology? It is risky. Biology carries a significant weightage (roughly 40 marks). You don't need to be a scientist, but basic knowledge of human anatomy and health is essential.

3. How do I make concise science notes? Use bullet points, mind maps, and comparison tables. For chemistry, maintain a separate list of chemical names, formulas, and their common uses in daily life.

4. Is the negative marking applicable in the science section? Yes, there is a penalty of 1/3rd of the marks assigned to a question for every wrong answer. Aim for accuracy over quantity.

5. Which books are best for NDA science preparation? NCERT (Class 9-12) is the primary source. Complement this with 'General Science' books for competitive exams to get a broader perspective on current scientific developments.

6. How many hours should I dedicate to science daily? If you have 3-4 months until the exam, dedicate at least 1.5 to 2 hours daily to science. Alternate between subjects (e.g., Physics on Mon/Wed/Fri, Chem/Bio on Tue/Thu/Sat) to maintain interest.