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Questions and Answers
What is the main focus of Chapter 2 in the Class 10 Science textbook?
The nature and behaviour of acids, bases, and salts
How can students improve their marks in the Class 10 Science examination?
By getting well-versed with the NCERT Solutions for Class 10 Science provided in Chapter 2
Why is Chapter 2 on Acids, Bases, and Salts considered important in the Class 10 Science curriculum?
It involves many practical experiments to help learners understand the basics
How many questions are typically asked from Chapter 2 in the Class 10 examination?
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What are the chances of scoring full marks on questions from Chapter 2 in the Class 10 examination?
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What type of reactions are described in Chapter 2 involving acids, bases, and salts?
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How can you identify the content in each of the three test tubes containing distilled water, an acidic solution, and a basic solution using red litmus paper?
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Why should curd and sour substances not be kept in brass and copper vessels?
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What gas is usually liberated when an acid reacts with a metal, and how can you test for its presence?
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Write a balanced chemical equation for the reaction between metal compound A and dilute hydrochloric acid if calcium chloride is formed. What gas is evolved in this reaction?
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Why do HCl, HNO3, etc., show acidic characters in aqueous solutions while solutions of compounds like alcohol and glucose do not show an acidic character?
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Study Notes
Importance of Chapter 2 in Class 10 Science
- Chapter 2 on Acids, Bases, and Salts is a crucial part of the Class 10 Science curriculum, making it essential for students to understand the concepts well to score high marks in the examination.
- The chapter is considered important as it lays the foundation for understanding various chemical reactions and processes that occur in daily life.
Scoring High in Class 10 Science Examination
- To improve their marks in the Class 10 Science examination, students should focus on understanding the concepts of Chapter 2 and practice applying them to different problems and scenarios.
- typically, 5-6 questions are asked from Chapter 2 in the Class 10 examination, making it a significant contributor to the overall score.
- Scoring full marks on questions from Chapter 2 is possible if students have a thorough understanding of the concepts and can apply them accurately.
Types of Reactions in Chapter 2
- Chapter 2 describes various types of reactions involving acids, bases, and salts, including neutralization reactions, displacement reactions, and reaction of acids with metals.
Identifying Acidic, Basic, and Neutral Solutions
- Red litmus paper can be used to identify the content of three test tubes containing distilled water, an acidic solution, and a basic solution.
- Acidic solutions turn red litmus paper red, basic solutions turn it blue, and neutral solutions do not change its color.
Precautions with Curd and Sour Substances
- Curd and sour substances should not be kept in brass and copper vessels as they react with the metals to form toxic compounds.
- This reaction can be harmful and even poisonous if ingested.
Reaction of Acids with Metals
- When an acid reacts with a metal, hydrogen gas is usually liberated.
- The presence of hydrogen gas can be tested using a burning splinter or a lighted candle, which will produce a popping sound when the gas is present.
Balanced Chemical Equation
- The balanced chemical equation for the reaction between metal compound A and dilute hydrochloric acid, resulting in the formation of calcium chloride, can be written as: Metal compound A + HCl → CaCl₂ + H₂
- Hydrogen gas is evolved in this reaction.
Acidic Characters of Compounds
- HCl, HNO₃, etc., show acidic characters in aqueous solutions because they dissociate into H⁺ ions, which are responsible for the acidic properties.
- Solutions of compounds like alcohol and glucose do not show an acidic character because they do not dissociate into H⁺ ions.
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Description
Ace your CBSE Class 10 Science exam with these free PDF NCERT solutions tailored for Chapter 2: Acids, Bases and Salts. Enhance your understanding by practicing answers from the NCERT textbook, boosting your preparation and aiming for top scores.
