Last Updated on August 26, 2024 by XAM CONTENT
Hello students, we are providing case study questions for class 10 science. Case study questions are the new question format that is introduced in CBSE board. The resources for case study questions are very less. So, to help students we have created chapterwise case study questions for class 10 science. In this article, you will find case study questions for cbse class 10 science chapter 2 Acids Bases and Salts.
| Chapter | Acids Bases and Salts |
| Type of Questions | Case Study Questions |
| Nature of Questions | Competency Based Questions |
| Board | CBSE |
| Class | 10 |
| Subject | Science |
| Useful for | Class 10 Studying Students |
| Answers provided | Yes |
| Difficulty level | Mentioned |
| Important Link | Class 10 Science Chapterwise Case Study |
Case Study Questions on Acids Bases and Salts
Questions
Question 1:
pH is quite useful to us in a number of ways in daily life. Some of its applications are:
Control of pH of the soil: Plants need a specific pH range for proper growth. The soil may be acidic, basic or neutral depending upon the relative concentration of H+ and OH-. The pH of any soil can be determined by using pH paper. If the soil is too acidic, it can be corrected by adding lime to it. If the soil is too basic, it can be corrected by adding organic manure which contains acidic materials.
Regaining shine of a tarnished copper vessel by use of acids: A copper vessel gets tarnished due to formation of an oxide layer on its surface. On rubbing lemon on the vessel, the surface is cleaned and the vessel begins to shine again. This is due to the fact that copper oxide is basic in nature, which reacts with the acid (citric acid) present in lemon to form a salt (copper citrate) which is washed away with water. As a result, the layer of copper oxide is removed from the surface of the vessel and the shining surface is exposed.
Self-defence by animals through chemical warfare: Stings of bees and ants contain methanoic acid. When stung, it causes lot of pain and irritation. This can be cured by rubbing the affected area with mild base like baking soda.
Read the above passage carefully and give the answer to the following questions:
(i) When black copper oxide placed in a beaker is treated with dilute HCl, its colour changes to
(a) white
(b) dark red
(c) bluish green
(d) no change.
Difficulty Level: Medium
Ans. Option (c) is correct.
Explanation: CuO + 2HCl → CuCl2 + 2H2O, CuCl2 is bluish green in colour.
(ii) P is an aqueous solution of acid and Q is an aqueous solution of base. When these two are diluted separately, then
(a) pH of P increases while that of Q decreases till neutralisation.
(b) pH of P decreases while that of Q increases till neutralisation.
(c) pH of both P and Q decrease.
(d) pH of both P and Q increase.
Difficulty Level: Medium
Ans. Option (a) is correct.
Explanation: On diluting, H+ ion concentration reduces per unit volume thus, pH increases.
On the other hand, on diluting, OH– concentration also reduces, pOH increases and pH decreases.
As, pOH + pH = 14.
Thus, pH of Q (basic solution) decreases while that of P (acidic solution) increases on dilution.
(iii) Which of the following acids is present in bee sting?
(a) Formic acid
(b) Acetic acid
(c) Citric acid
(d) Hydrochloric acid
Difficulty Level: Medium
Ans. Option (c) is correct.
Explanation: Formic acid is the common name of methanoic acid, and it is present in bee sting
(iv) Sting of ant can be cured by rubbing the affected area with soap because
(a) it contains oxalic acid which neutralises the effect of formic acid
(b) it contains aluminium hydroxide which neutralises the effect of formic acid
(c) it contains sodium hydroxide which neutralises the effect of formic acid
(d) none of these.
Difficulty Level: Easy
Ans. Option (c) is correct
(v) The pH of soil X is 7.5 while that of soil Y is 4.5. Which of the two soils, should be treated with powdered chalk to adjust its pH?
(a) X only
(b) Y only
(c) Both X and Y
(d) None of these
Difficulty Level: Medium
Ans. Option (b) is correct.
Explanation: Soil Y is acidic. Hence, it should be treated with powdered chalk to reduce its acidity
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Topics from which case study questions may be asked
- Introduction to Acids, Bases, and Salts
- Definitions of Acids and Bases
- Properties of Acids and Bases
- Salts and their Types
- pH Scale
- Indicators
- Importance and Uses of Acids, Bases, and Salts
- Preparation and Properties of Some Important Compounds
- Chemical Reactions of Acids and Bases
This chapter deals with the basic understanding of acids, bases, and salts, including their properties, reactions, pH scale, indicators, and practical applications.
Important Links for CBSE Class 10 Science Chapter 2 Acids Bases and Salts
- Download Chapter Test for CBSE Class 10 Science Chapter 2 Acids Bases and Salts
- Download 82 Important Questions for CBSE Class 10 Science Chapter 2 Acids Bases and Salts
Helpful Links for CBSE Class 10 Science Preparation
- Download 125 Important Case Study Questions for CBSE Class 10 Science
- Download 220 Important Assertion Reason Questions for CBSE Class 10 Science
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- Download 65 Important Numerical Problems for CBSE Class 10 Physics
- Download 60 Important Diagram Based Questions for CBSE Class 10 Physics
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- Download Chapter Test for CBSE Class 10 Science
Frequently Asked Questions (FAQs) on Acids Bases and Salts Case Study Questions
Q1: What are case study questions for CBSE examinations?
A1: Case study questions in CBSE examinations typically involve scenarios or real-life examples, requiring students to apply their understanding of concepts to solve problems or analyze situations.
Q2: Why are case study questions important for understanding class 10 science chapters?
A2: Case study questions provide a practical context for students to apply theoretical knowledge to real-world situations, fostering deeper understanding and critical thinking skills.
Q3: How should students approach answering case study questions for CBSE?
A3: Students should carefully read the case study, identify the key issues or problems presented, analyze the information provided, apply relevant concepts and principles of chemical reactions and equations, and formulate well-supported solutions or responses.
Q4: Are there any resources available online for students to practice case study questions on class 10 science chapters for CBSE exams?
A4: Yes, several educational websites offer case study questions for CBSE students preparing for science examinations. We also offer a collection of case study questions for all classes and subject on our website. Visit our website to access these questions and enhance your learning experience. If you need more case study questions for your preparation, then you visit Physics Gurukul website.
Q5: How can students effectively prepare for case study questions on acids, bases and salts for CBSE exams?
A5: Effective preparation strategies include regular revision of concepts, solving practice questions, analyzing case studies from previous exams, seeking clarification on doubts, and consulting with teachers or peers for guidance and support.
Q6: How can teachers incorporate case study questions on acids, bases and salts class 10 science into classroom teaching?
A6: Teachers can integrate case studies into lesson plans, group discussions, or interactive activities to engage students in active learning, promote problem-solving skills, and facilitate a deeper understanding of acids, bases and salts.
Q7: What is an acid?
A7: An acid is a substance that ionizes in water to produce hydrogen ions (H⁺) as the only positive ions. Examples include hydrochloric acid (HCl) found in gastric juices, citric acid in citrus fruits, acetic acid in vinegar, and sulfuric acid (H₂SO₄) in car batteries.
Q8: What are the properties of acids?
A8: Acids taste sour, turn blue litmus paper red, react with metals to produce hydrogen gas, and react with bases to form salts and water.
Q9: How do acids react with metals? Give examples.
A9: Acids react with metals to produce a salt and hydrogen gas. For example: 2HCl + Mg → MgCl₂ + H₂.
Q10: What is a base?
A10: A base is a substance that ionizes in water to produce hydroxide ions (OH⁻) as the only negative ions. Examples include sodium hydroxide (NaOH), potassium hydroxide (KOH), and calcium hydroxide [Ca(OH)₂].
Q11: What are the properties of bases?
A11: Bases taste bitter, feel slippery, turn red litmus paper blue, and react with acids to form salts and water.
Q12: Differentiate between acids and bases based on their taste, effect on litmus paper, and chemical behavior.
A12: Acids taste sour, turn blue litmus paper red, and react with metals to produce hydrogen gas. Bases taste bitter, turn red litmus paper blue, and react with acids to form salts and water.
