General Science for CDS & Defence Exams

By : Naveen Singh

Updated : Dec 3, 2020, 23:41

General Science is one of the most important topics that appear time and again in almost all of the defense examinations. By definition, General Science includes topics of physics, chemistry, biology, and ecology. It relates to the scientific questions that observed in our day-to-day lives. Thus it is very important to have access to General Science study materials in the form of practice quizzes and online tests with answers for Defence exams.

Defense exams are one of the most sought after career options for the youth of the nation. General Science plays a key important role in all the CDS, NDA, AFCAT, CAPF, CISF, and other defense exams.

Important General Science Topics For Defence Exams

While the specific syllabus of different exams is not exactly the same, some general topics have been listed below:




Measurements & Motion, Laws of Motion, Force, Work, Energy & Power, Force of Gravity, Solids & Fluids, Sound, Oscillations, Heat & Thermodynamics, Electricity, Magnetism & Light, Modern physics & Sources of energy


Chemistry, Matter & its Composition, Atoms, Molecules & Nuclear Chemistry, Elements Classification & Chemical Bonding, Acids, Bases, Salts & Metals, Non - Metals, Organic Chemistry, Environmental Chemistry


Biological Classification/ Cell & its Division, Genetics & Biotechnology, Evolution and Ecological Biodiversity, Tissue, Physiology of Plants and Animals, Reproduction, Nutrition, Health, and Diseases, Food Production

Science and Technology

Computer and Technology, Communication, Defence, Space Technology, Energy, Nuclear Science

Tips to Prepare General Science questions

  1. Solve Previous Years’ question papers: This strategy alone will help you to keep track of your time. This also helps you to get used to the format of the question paper. Solving previous years’ question papers also helps you to understand the topic-wise weightage and if practiced early enough, will help you to recognize your weaknesses and strengths.
  2. Time Management: The trick is not to waste precious time when you’re stuck on a difficult question. 
  3. Try to connect events like dots: This way it is easier to remember events, people, and happenings.
  4. General Awareness: Try to remain updated with what’s going around the world. Keep yourself aware of general science, most importantly.

Check also: Start the online test with the Defence Practice Set Papers

Importance of General Science topics in Defence exams

  1. General Science topics include Physics, Chemistry, Biology, and Ecology.
  2. General Science topics are very important because a student’s ability to score well in these questions implies a sound and well aware brain.
  3. A student who is aware of general science will be able to deal with situations of crisis in a better manner.
  4. A student’s awareness of general science also guarantees that he/she will not take decisions that violate the general scientific facts and hence, will perform the best with the resources at his/her disposal.

Recommended books for General Science in Defence exams

The books recommended for general science cannot be memorized at one go and should be referred to time and again by the aspiring student. Also, not that any other book by a good publisher will also work well for the purpose. 

Book Name


General Science for Competitive Exams

B.K. Publications, Pvt. Ltd.

General Science for Competitive Exams  (English, Paperback, unknown)

Disha Publication

Lucent’s General Science

Lucent Publication

Science and Technology 

McGraw Hill Education Pvt Ltd

Why prepare General Science from BYJU'S Exam Prep?

BYJU'S Exam Prep provides premium quality online study materials and online test series. Defence test series are very important for rigorous training in concepts. BYJU'S Exam Prep provides assurance for completion of the syllabus on time and structured online classes and study material for the same. The extensively experienced mentors help in complete doubt resolution.  Discussion boards are also organized so that aspirants can get to know the topics where other students are getting stuck. The students can also keep track of the progress made by timely report cards. Students can also envision their progress and preparation with the help of daily preparation plans.

General Science Frequently Asked Questions

1. How much fee do I have to pay to avail of the services offered by BYJU'S Exam Prep?

BYJU'S Exam Prep believes that students are the future of the nation. It also believes that good quality study material is the right of every hardworking student. Thus, BYJU'S Exam Prep provides free quality material not just on its website but also on its youtube channel. However, there are some courses which are paid courses for which you can visit BYJU'S Exam Prep to know more.

2. How do I know if the mentors are the best ones for me?

BYJU'S Exam Prep selects its mentors through a very extensive process to bring to you only the ones who are not only clear on concepts but are also able to impart the knowledge well. BYJU'S Exam Prep’s youtube channel provides an analysis of newspapers for students to stay updated and aware. One can look up the videos to see how efficient the mentors really are.

3. Which Govt. exams can I prepare with the help of BYJU'S Exam Prep?

You can prepare every kind of Govt. Exams such as banking, IAS, SSC, Defence exams, and many more competitive exams with the help of BYJU'S Exam Prep. 

4. Can I study for partial sections and not the whole syllabus using BYJU'S Exam Prep?

Yes, BYJU'S Exam Prep lets students choose according to their convenience. BYJU'S Exam Prep also provides updates on the recent exams that will help students keep track of things without a hassle.