Marking Scheme for NDA Exam's Physics, Chemistry, and General Science Sections

Physics:
- The Physics section of the NDA exam consists of questions that test the candidates' understanding of basic concepts, principles, and laws related to physics.
- The marking scheme for the Physics section is as follows:
- Each correct answer carries 2.5 marks.
- For every incorrect answer, 0.83 marks will be deducted.
- Unanswered questions do not have any penalty or marks deducted.

Chemistry:
- The Chemistry section of the NDA exam evaluates the candidates' knowledge of various chemical concepts, elements, compounds, and reactions.
- The marking scheme for the Chemistry section is as follows:
- Each correct answer is awarded 2.5 marks.
- For every incorrect response, 0.83 marks will be deducted.
- Unanswered questions do not have any penalty or marks deducted.

General Science:
- The General Science section of the NDA exam covers a wide range of topics including biology, chemistry, physics, and environmental science.
- The marking scheme for the General Science section is as follows:
- Each correct answer carries 4 marks.
- For every incorrect response, 1.33 marks will be deducted.
- Unanswered questions do not have any penalty or marks deducted.

It is important for candidates to keep in mind that the NDA exam follows a negative marking scheme, where marks are deducted for incorrect answers. Therefore, it is advisable to attempt only those questions for which the candidate is reasonably sure of the correct answer. Guessing or random answering may result in a significant deduction of marks, reducing the overall score.

Preparing for the exam thoroughly by understanding the concepts, practicing previous years' question papers, and taking mock tests can help candidates improve their accuracy and minimize the chances of negative marking. It is also essential to manage time effectively during the exam to ensure that all sections are attempted within the given time limit.

Remember to rely on trusted educational resources such as EduRev for study materials, previous years' question papers, and practice tests to enhance your preparation.