Complete Guide to NDA chemistry syllabus class 11 12 2026

The NDA chemistry syllabus class 11 12 covers fundamental physical, inorganic, and organic chemistry principles tested in the General Ability Test (GAT) Paper II, accounting for nearly 60 marks through direct conceptual questions, chemical equations, and structural analysis designed to evaluate an aspirant's foundational scientific aptitude.

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, unmarried male and female candidates seeking entry into the Army, Navy, and Air Force wings of the NDA, as well as the Indian Naval Academy Course (INAC). Successful candidates undergo rigorous training at the premier academies before being commissioned as elite commissioned officers in the Indian Armed Forces.

The selection process comprises a comprehensive written examination followed by the Services Selection Board (SSB) interview, which evaluates psychological aptitude, intelligence, and personality. Within the written examination, the General Ability Test (GAT) plays a pivotal role. Paper II of the GAT section features a dedicated segment for Chemistry, testing a candidate's understanding of matter, atomic structure, chemical bonding, reactions, and everyday applications of science. Because chemistry questions are objective and highly scoring, mastering the prescribed Class 11 and Class 12 curriculum is vital for clearing the sectional and overall cut-off.

Key Highlights 2026

Navigating the NDA examination landscape requires keeping track of essential milestones, exam structures, and authority updates for the 2026 recruitment cycle. We at ExamBhai have compiled the most critical highlights to help you align your preparation with current standards.

Syllabus 2026

The chemistry syllabus for NDA is structurally aligned with the NCERT Class 11 and Class 12 science curriculum. UPSC expects candidates to demonstrate a clear understanding of basic chemical concepts without delving into overly complex collegiate-level derivations. Below is the detailed breakdown of the topics tested under the NDA chemistry syllabus class 11 12.

To thoroughly test spatial understanding and functional group identification, examiners frequently incorporate molecular structures. For instance, consider the structural configuration given below:

Nc1cccc(c1)[N+](=O)[O-

Understanding how functional groups interact in such aromatic nitro compounds is crucial for answering organic chemistry reactions accurately in the exam.

Exam Pattern

The written examination for NDA consists of two papers: Mathematics and the General Ability Test (GAT). Chemistry forms a subset of Part B of the GAT paper, which tests General Knowledge.

| Paper | Subject | Questions | Marks | Duration | |---|---|---|---|---|| | Paper I | Mathematics | 120 | 300 | 2.5 Hours | | Paper II | General Ability Test (GAT) | 150 | 600 | 2.5 Hours | | GAT Part A | English | 50 | 200 | Included in GAT | | GAT Part B | General Knowledge (Physics, Chemistry, General Science, History, Geography, Current Events) | 100 | 400 | Included in GAT |

Within GAT Part B, General Science typically commands around 50 questions, carrying 200 marks. Chemistry contributes roughly 15 questions, yielding 60 marks. Every correct response awards 4 marks, while an incorrect response incurs a negative penalty of (1.33) marks. Unattempted questions attract no penalty. To practice these patterns effectively, you can practice free mock tests for Defence on ExamBhai to build speed and accuracy under timed conditions.

Eligibility Criteria

According to official notifications published by the Union Public Service Commission (source: upsc.gov.in), candidates must fulfill stringent nationality, age, educational, and physical standards to appear for the NDA examination.

• Nationality: Must be an Indian citizen, a subject of Bhutan, a subject of Nepal, or a Tibetan refugee who came over to India before January 1, 1962, with the intention of permanently settling in India.
• Age Limit: Only unmarried male and female candidates born between specific dates outlined in the official notification are eligible. Typically, candidates must fall within the 16.5 to 19.5 age bracket.
• Educational Qualification:
  • For Army Wing: Passed Class 12th under the 10+2 pattern of school education or equivalent examination conducted by a State Education Board or a University.
  • For Air Force, Naval Wings, and 10+2 Cadet Entry Scheme at the Indian Naval Academy: Passed Class 12th with Physics, Chemistry, and Mathematics.
• Physical Standards: Candidates must be physically fit according to guidelines specified by the official governing portal, upsc.gov.in.

Application Process

The application process for NDA is conducted entirely online through the official UPSC portal. Aspirants must complete a two-stage registration procedure.

1. One-Time Registration (OTR): Visit the official website upsc.gov.in or upsconline.nic.in. Complete the OTR profile by entering basic personal, educational, and contact details. This profile remains valid for all future UPSC examinations.
2. Application Form Submission: Log in using your OTR credentials or registration ID, select the active NDA examination link, fill in the required details regarding exam centers, upload scanned copies of your photograph and signature adhering to specified pixel and dimension limits, and verify all entries.
3. Fee Payment: Pay the application fee of ₹100 (exempted for SC/ST candidates, female candidates, and wards of JCOs/NCOs/ORs) through online modes such as net banking, debit/credit cards, or via SBI bank challan.
4. Final Confirmation: Submit the application form and take a printout of the final confirmation page for future reference.

Preparation Strategy

Cracking the NDA chemistry syllabus class 11 12 requires a systematic approach that balances theoretical clarity with regular problem-solving. Because the questions test both conceptual fundamentals and practical applications, a structured study plan is indispensable.

• Master NCERT Textbooks: Treat Class 11 and Class 12 NCERT Chemistry textbooks as your primary script. Focus heavily on chapter summaries, in-text examples, and exercise questions.
• Focus on High-Weightage Chapters: Prioritize atomic structure, chemical bonding, periodic classification, oxidation-reduction reactions, and basic organic chemistry reactions. Questions involving chemical equations like (2H_2 + O_2 \to 2H_2O) frequently appear in direct or conceptual formats.
• Revise Chemical Formulas and Reactions: Create concise revision notes for important inorganic compounds, their preparation methods, and common industrial uses. Memorize standard valencies and oxidation states.
• Practice Previous Years' Papers: Solve at least the last 5 to 10 years of NDA question papers to understand question trends, recurring concepts, and the exact difficulty level set by UPSC.
• Attempt Timed Mock Assessments: Regular evaluation is key to managing time during the actual GAT paper. You can practice free mock tests for Defence on ExamBhai to pinpoint weak areas across physical, organic, and inorganic chemistry.
• Incorporate Smart Revision Techniques: Review complex structural representations and functional groups regularly. For deeper sectional practice, you should practice free mock tests for Defence on ExamBhai to simulate real exam pressure and enhance your scoring potential.

Cut-Off Trends

Official cut-off marks for the NDA examination are released by the Union Public Service Commission (source: upsc.gov.in) only after the final declaration of the merit list, covering both written exam stages and SSB interviews.

Historically, the written exam cut-off hovers around (30)% to (35)% aggregate marks across all subjects, provided candidates clear the sectional cut-off (typically (25)%) in both Mathematics and GAT. Out of a total written score of 900 marks, a safe target for aspirants aiming for top merit ranks is securing upwards of (360 - 400) marks. For GAT specifically, aiming for a net score of (300+) ensures that minor variations in sectional difficulty will not jeopardize your selection prospects.

Frequently Asked Questions

Q1: What is the weightage of chemistry in the NDA GAT paper? Chemistry generally contributes around 15 questions in the GAT paper, carrying a total weightage of approximately 60 marks out of the 600 total GAT marks.

Q2: Is Class 12 chemistry compulsory for all NDA wings? While Physics and Mathematics in Class 12 are strictly mandatory for the Air Force and Naval wings, candidates from any stream (including Humanities or Commerce) can apply for the Army wing as long as they have passed Class 12 from a recognized board.

Q3: Are numerical problems frequently asked in NDA chemistry? UPSC primarily focuses on conceptual clarity, theoretical principles, and qualitative understanding rather than heavy numerical calculations in chemistry. However, basic stoichiometry, mole concept, and concentration calculations may occasionally feature simple numeric values.

Q4: How should I cover organic chemistry for NDA? Focus on functional groups, homologous series, basic nomenclature, structural isomerism, and common organic compounds used in daily life, such as soaps, detergents, polymers, and alcohols.

Q5: Is negative marking applicable to chemistry questions in GAT? Yes. Each incorrect answer in the GAT paper incurs a penalty of one-third of the marks allotted to that question, which translates to (-1.33) marks for a chemistry question carrying 4 marks.

Q6: Can I clear NDA chemistry by studying only NCERT books? NCERT textbooks for Class 11 and Class 12 serve as the gold standard for the NDA chemistry syllabus. Thoroughly mastering NCERT concepts, coupled with consistent practice of previous years' questions, is more than sufficient to score high in this section.