Last Updated on December 5, 2024 by sanjjeett
Hello students, we are providing assertion and reasoning questions for ICSE class 10 chemistry. Assertion and reasoning questions are the new question format that is introduced in CISCE (ICSE and ISC) board. The resources for ICSE assertion and reasoning questions are very less. So, to help icse board students we have created chapterwise assertion and reasoning questions for class 10 chemistry. In this article, you will find assertion and reasoning questions for ICSE Class 10 Chemistry Chapter 3 Acids, Bases and Salts.
| Chapter | Acids, Bases and Salts |
| Type of Questions | Assertion and Reasoning Questions |
| Nature of Questions | Competency Based Questions |
| Board | ICSE |
| Class | 10 |
| Subject | Chemistry |
| Useful for | Class 10 Studying Students |
| Answers provided | Yes |
| Difficulty level | Mentioned |
| Important Link | ICSE Class 10 Chemistry Chapterwise Assertion Reasoning |
Assertion and Reasoning Questions on Acids, Bases and Salts for ICSE Class 10 Chemistry
Assertion and reasoning questions are also known as assertion reason questions. Assertion-Reason questions are a type of question format used in ICSE exams where two statements are provided: an Assertion (A) and a Reason (R). Students need to determine whether each statement is true or false and if the Reason correctly explains the Assertion.
Directions:
(a) Assertion and Reason both are correct statements and reason is the correct explanation of the assertion.
(b) Assertion and Reason both are correct statements, but reason is not the correct explanation of the assertion.
(c) Assertion is true, but reason is false.
(d) Assertion is false, but reason is true.
Q. 1. Assertion: Solutions of compounds like alcohol and glucose do not show acidic character.
Reason: They do not show acidic character because they do not dissociate into ions.
Difficulty Level: Medium
Ans. (a) Assertion and Reason both are correct statements, and reason is the correct explanation of the assertion.
Explanation:
Solutions of compounds like alcohol and glucose do not show acidic character because like acids such as HCl which dissociates into H+ and Cl– ion these solutions do not dissociate into ions. Thus, both assertion and reason are true and reason is the correct explanation of the assertion.
Q. 2. Assertion: Tap water conducts electricity but distill water does not conduct electricity.
Reason: Tap water conducts electricity as it contains ions whereas distilled water does not contain ions.
Ans. (a) Assertion and Reason both are correct statements, and reason is the correct explanation of the assertion.
Explanation:
Tap water conducts electricity as it contains ions whereas distilled water does not contain ions. Thus, both assertion and reason are true and reason is the correct explanation of the assertion.
Q. 3. Assertion: Dilute hydrochloric acid reacts with zinc to produce hydrogen gas.
Reason: Zinc is less reactive than hydrogen.
Concept: Requires understanding of reactivity series and reaction types.
Difficulty Level: Medium
Answer: C (Assertion is correct; Reason is incorrect).
Explanation: Zinc is more reactive than hydrogen, so it displaces hydrogen from hydrochloric acid, forming hydrogen gas.
Q. 4. Assertion: Sodium hydroxide is used in the manufacture of soap.
Reason: Sodium hydroxide is a strong base that saponifies fats.
Concept: Common knowledge in organic chemistry and basic reactions.
Difficulty Level: Easy
Answer: A (Both Assertion and Reason are correct; Reason explains Assertion).
Explanation: Sodium hydroxide breaks down fats into soap and glycerol, making it an essential ingredient in soap production.
Q. 5. Assertion: Phenolphthalein changes color in a basic solution.
Reason: Phenolphthalein is an acid-base indicator.
Concept: Simple acid-base concepts and use of indicators.
Difficulty Level: Easy
Answer: A (Both Assertion and Reason are correct; Reason explains Assertion).
Explanation: Phenolphthalein turns pink in basic solutions, making it a reliable indicator.
Q. 6. Assertion: Lime water turns milky when carbon dioxide is passed through it.
Reason: Calcium carbonate is insoluble in water.
Concept: Familiarity with chemical reactions and solubility concepts is needed.
Difficulty Level: Medium
Answer: A (Both Assertion and Reason are correct; Reason explains Assertion).
Explanation: CO₂ reacts with calcium hydroxide (lime water), forming insoluble calcium carbonate, causing the milky appearance.
Q. 7. Assertion: Baking soda is used as an antacid.
Reason: Baking soda neutralizes stomach acid due to its basic nature.
Concept: Relates to basic real-life applications of chemistry.
Difficulty Level: Easy
Answer: A (Both Assertion and Reason are correct; Reason explains Assertion).
Explanation: Baking soda (sodium bicarbonate) neutralizes excess hydrochloric acid in the stomach, providing relief from acidity.
Q. 8. Assertion: Acids react with metal oxides to form salt and water.
Reason: Metal oxides are basic in nature.
Concept: Understanding of acid-base neutralization reactions is required.
Difficulty Level: Medium
Answer: A (Both Assertion and Reason are correct; Reason explains Assertion).
Explanation: Metal oxides react with acids in a neutralization reaction to produce salt and water.
We hope the given ICSE assertion reasoning questions for Acids, Bases and Salts helps you in your learning.
Also check
- Mole Concept and Stoichiometry Assertion and Reasoning Questions for ICSE Class 10 Chemistry Chapter 5
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- Periodic Properties and Variation of Properties Assertion and Reasoning Questions for ICSE Class 10 Chemistry Chapter 1
- Chemical Bonding Assertion and Reasoning Questions for ICSE Class 10 Chemistry Chapter 2
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Topics from which assertion reasoning questions may be asked
- Simple definitions in terms of the molecules and their characteristic properties
- Ions present in mineral acids, alkalis and salts and their solutions
- Use of litmus and pH paper to test for acidity and alkalinity.
- Definition of salt; types of salts.
- Action of dilute acids on salts.
- Methods of preparation of Normal salts with relevant equations. (Details of apparatus or procedures not required).
Assertion and reasoning questions based on above topics may be asked.
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Topics found difficult by students
- Identification of gases and compounds.
- Methods of preparation of salts.
- Identifying the salts from the given observations.
- Connecting the type of solution to its pH value based on certain observations.
- Gases involved in reactions.
- Neutralisation or titration.
These are the topics from chapter Acids, Bases and Salts, generally found difficult by students studying in ICSE Class 10 Chemistry.
Understanding Acids, Bases and Salts
Acids, bases, and salts are key concepts in chemistry. Acids are substances that release hydrogen ions (H⁺) in water, turning blue litmus paper red. Examples include hydrochloric acid (HCl) and sulfuric acid (H₂SO₄). Bases, on the other hand, are substances that release hydroxide ions (OH⁻), turning red litmus paper blue. Sodium hydroxide (NaOH) and calcium hydroxide (Ca(OH)₂) are common bases. When acids and bases react, they form salts and water in a neutralization reaction. Salts, like sodium chloride (NaCl), are ionic compounds formed when the positive ion of a base combines with the negative ion of an acid. Understanding these substances helps in chemical reactions, industrial applications, and everyday life.
Frequently Asked Questions (FAQs) on Acids, Bases and Salts ICSE Class 10 Chemistry Assertion and Reasoning Questions
Q1: What are Assertion and Reasoning questions?
A1: Assertion and Reasoning questions are a type of question format used in ICSE exams where two statements are provided: an Assertion (A) and a Reason (R). Students need to determine whether each statement is true or false and if the Reason correctly explains the Assertion.
Q2: How do Assertion Reasoning questions differ from other question types?
A2: Unlike multiple-choice questions, Assertion-Reason questions require students to analyze the relationship between two statements. It’s not just about knowing the facts but understanding how they connect logically.
Q3: What steps should I follow to correctly answer Assertion and Reasoning questions?
A3: Follow these steps:
Read both statements carefully. Understand what each statement is saying.
Determine the truth value of each statement. Decide if each statement is true or false independently.
Analyze the relationship. If both statements are true, decide whether the Reason (R) correctly explains the Assertion (A).
Choose the correct option. Based on your analysis, select the appropriate answer from the given options.
Q4: What options are typically provided for Assertion and Reasoning questions?
A4: The typical options are:
A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, but R is not the correct explanation of A.
C. A is true, but R is false.
D. A is false, but R is true.
Q5: What should I check to determine if the Reason correctly explains the Assertion?
A5: Ensure that the Reason provides a logical explanation for the Assertion. Check if the Reason directly addresses the cause or basis of the Assertion and if they are contextually linked.
Q6: How can I improve my skills in answering Assertion and Reasoning type questions?
A6: Practice regularly with sample questions and past papers. Focus on understanding the concepts thoroughly rather than rote memorization. Analyzing how different facts and concepts interrelate will enhance your ability to correctly answer these questions.
Q7: What are common mistakes to avoid when answering Assertion and Reasoning questions?
A7: Common mistakes include:
Not reading the statements carefully and missing key details.
Assuming the Reason explains the Assertion without checking the logical connection.
Confusing the order or relationship between the statements.
Overthinking and adding information not provided in the question.
Q8: What resources can help me practice Assertion and Reasoning questions for ICSE Class 10 Chemistry?
A8: Use study guides specifically designed for Assertion-Reason questions. Online educational platforms and reference books for ICSE Class 10 Chemistry also offer practice questions and explanations. xamcontent.com/cisce also provides assertion reason questions for ICSE Class 10 Chemistry.
Q9: Why dilute sulphuric acid is stronger acid than concentrated sulphuric acid?
A9: The strength of an acid is typically determined by its ability to donate hydrogen ions (H+) when dissolved in water. When sulphuric acid is concentrated, it contains a higher concentration of H2SO4 molecules. As a result, it has the potential to release a greater number of hydrogen ions into solution when it dissociates. The concentration of H+ ions in concentrated sulphuric acid is much higher, making it a stronger acid. On the other hand, dilute sulphuric acid has a lower concentration of H2SO4 molecules, so it releases fewer hydrogen ions into solution compared to concentrated sulphuric acid. Thus, it is less acidic.
Q10: Carbonic acid is a dibasic acid. Why?
A10: Carbonic acid (H2CO3) is considered as a dibasic acid because it can donate two hydrogen ions (H+) or protons when it ionises in aqueous solution.
Q11: Lime juice has a sour taste while lime water is slightly bitter. Why?
A11: The sour taste in lime juice is primarily due to the presence of citric acid and its acidity, while the slightly bitter taste in lime water is a result of the alkaline nature of calcium hydroxide. These differences in taste are a reflection of the pH and chemical composition of the two solutions.
