The NDA CDS 1 2026 examination tests candidates on fundamental concepts of General Science, including essential Chemistry topics. Understanding Redox Reactions and Carbon and its Compounds is crucial, as these topics frequently appear in multiple-choice questions. Mastering the concepts, common definitions, and applications will help improve accuracy and speed during the exam.
In today’s Class-4 session, we will revise key principles of oxidation–reduction, electron transfer, carbon versatility, and compound classification, enabling you to solve MCQs confidently.
PART A — Redox Reactions
Subtopics
1. Concept of Oxidation and Reduction
- Oxidation: Addition of oxygen / removal of hydrogen / loss of electrons
- Reduction: Removal of oxygen / addition of hydrogen / gain of electrons
- Oxidizing agent and reducing agent
2. Redox Reactions in Terms of Electron Transfer
- Electron donor vs electron acceptor
- Identification of oxidation numbers
3. Oxidation Number Method
- Rules for assigning oxidation numbers
- Balancing redox equations via oxidation number method
4. Types of Redox Reactions
- Combination reactions
- Decomposition reactions
- Displacement reactions
- Disproportionation reactions
5. Everyday Applications of Redox
- Rusting of iron
- Combustion
- Electrochemical cells (basic idea)
PART B — Carbon and Its Compounds
Subtopics
1. Allotropes of Carbon
- Diamond, graphite, fullerenes
- Structure and properties
2. Covalent Bonding in Carbon
- Tetravalency of carbon
- Straight-chain, branched-chain, and ring structures
3. Hydrocarbons
- Saturated (alkanes)
- Unsaturated (alkenes, alkynes)
- Isomerism (basic idea)
4. Functional Groups
- Alcohols, aldehydes, ketones, acids, amines, etc.
- Identification in MCQs
5. Important Carbon Compounds
- Ethanol and ethanoic acid
- Soap and detergents (basic concept)
Conclusion
Redox reactions and carbon compounds form a fundamental part of Chemistry in the NDA CDS 1 2026 exam. A strong grip over oxidation–reduction principles, electron transfer, carbon bonding, functional groups, and related applications will significantly boost your MCQ performance. This class aims to strengthen your conceptual clarity and prepare you for typical exam-style questions confidently and efficiently.
