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Acids, Bases and Salts

NIOS · Class 10 · Science & Tech

Quick revision notes for Acids, Bases and Salts — NIOS Class 10 Science & Tech. Key concepts, formulas, and definitions for last-minute revision.

43 questions30 flashcards5 concepts

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Key Topics to Revise

1

1. Acids and Bases: Basic Ideas

  • The term acid comes from the Latin word meaning sour.
  • Robert Boyle first used the terms acid and base in the seventeenth century based on properties such as taste, corrosive nature, litmus change, and mutual neutralisation.
  • An acid is a substance which furnishes hydrogen ions (H+) when dissolved in water.
2

2. Indicators and Their Colours

  • Indicators are substances that show one colour in acidic medium and another colour in basic medium.
  • Litmus is a natural dye from lichens and the earliest indicator.
  • Litmus is red in acidic solution, blue in basic solution, and purple in neutral solution.
3

3. Properties and Reactions of Acids

  • Acids generally taste sour.
  • Acids are corrosive to metals.
  • Solutions of acids in water conduct electricity because they produce ions.
4

4. Properties and Reactions of Bases

  • Bases taste bitter and feel soapy to touch.
  • Aqueous solutions of bases conduct electricity because they produce ions.
  • Bases furnish OH- ions in water.

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Full Notes

Key Concepts

An acid furnishes hydrogen ionsIndicators change colour in acidicStrong acids and bases dissociate completelyAcids and bases show their acidicNeutralization is the reaction of

Frequently Asked Questions

What are the important topics in Acids, Bases and Salts for NIOS Class 10 Science & Tech?
Key topics in Acids, Bases and Salts include Acids, Bases and Salts - Complete Concept Map, Acids, Bases and Salts - Complete Chapter Overview, Complete Overview of Acids, Bases and Salts. These are the concepts NIOS Class 10 examiners draw on most — study them first, then practise related questions.
How to score full marks in Acids, Bases and Salts — NIOS Class 10 Science & Tech?
Understand the core concepts first, then work through the 43 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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