Acids, bases and salts form one of the most fundamental chapters of Chemistry and are highly relevant for the General Science section of the NDA CDS 1 2026 examination. Understanding their properties, reactions, and applications helps build strong basics for solving conceptual as well as application-based questions.
This chapter acts as a foundation for further concepts such as neutralisation, pH, indicators, and chemical reactions involving everyday substances.
Subtopics Covered in Class 1
1. Introduction to Acids, Bases and Salts
- Definition of acids, bases, and salts
- Role of ions (H⁺ and OH⁻) in determining acidic or basic nature
- Importance of acid–base chemistry in daily life and in NDA exam questions
2. Characteristics of Acids
- Physical properties: taste, corrosive nature, electrical conductivity
- Chemical properties: reaction with metals, carbonates, bases
- Common examples: HCl, H₂SO₄, acetic acid
3. Characteristics of Bases
- Physical properties: taste, feel, solubility
- Chemical properties: reaction with acids, ammonium salts, metals (limited)
- Common examples: NaOH, KOH, Ca(OH)₂
4. Understanding Salts
- Formation of salts through neutralisation
- Types of salts: normal, acidic, basic
- Examples and uses: NaCl, baking soda, washing soda
5. Indicators (Brief Introduction)
- Natural and synthetic indicators
- Litmus, phenolphthalein, methyl orange
- Their color changes in acids and bases
6. Importance of pH (Introductory Note)
- Concept of pH scale in measuring acidity/basicity
- Relevance to biological systems and environmental chemistry
Relevance to NDA CDS 1 2026 Exam
- The exam often includes direct conceptual questions from Acids, Bases and Salts.
- Expect questions on properties, reactions, identification of substances using indicators, and real-life applications.
- Strengthening this chapter helps improve accuracy in the General Science (Chemistry) section, which is crucial for improving overall written examination performance.
Conclusion
This class provides the foundational understanding necessary for mastering the chapter Acids, Bases and Salts. The concepts taught today—such as properties of acids and bases, formation of salts, and basic indicator behavior—are essential for solving both theoretical and application-based questions in the NDA CDS 1 2026 exam. A strong grip on these basics ensures confidence in handling more advanced topics in subsequent classes.
