Hello students, we are providing assertion reason questions for class 7 science (Curiosity). Assertion reason questions are the new question format that is introduced in CBSE board. The resources for assertion reason questions are very less. So, to help students we have created chapterwise assertion reason questions for class 7 science. In this article, you will find assertion reason questions for CBSE Class 7 Science Chapter 2 Exploring Substances: Acidic, Basic, and Neutral.
The NCERT Curiosity Science textbook for Class 7, developed as per the latest National Education Policy (NEP) 2020, is a fresh and engaging resource for young learners. Titled “Curiosity: Textbook of Science for Grade 7”, this new Class 7 Science book includes 12 thoughtfully designed chapters. Each chapter encourages students to explore real-world scientific concepts, develop critical thinking, and spark curiosity through hands-on experiences and relatable content. With its learner-centric approach, the Curiosity textbook aims to connect students with the world around them and inspire a lifelong love for science.
| Chapter | Exploring Substances: Acidic, Basic, and Neutral |
| Book | Curiosity: Textbook of Science for Grade 7 |
| Type of Questions | Assertion Reason Questions |
| Nature of Questions | Competency Based Questions |
| Board | CBSE |
| Class | 7 |
| Subject | Science |
| Useful for | Class 7 Studying Students |
| Answers provided | Yes |
| Difficulty level | Mentioned |
| Important Link | Class 7 Science Chapterwise Assertion Reason |
Assertion Reason Questions on Exploring Substances: Acidic, Basic, and Neutral
Assertion Reason Questions
Q1. Assertion (A): Litmus paper changes colour in the presence of acidic or basic substances.
Reason (R): Litmus is a synthetic indicator manufactured in laboratories.
Options:
(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, and R is also false.
Answer: (c) A is true, but R is false.
Explanation: Litmus is a natural indicator derived from lichens, not synthetic.
Difficulty Level: Moderate
Q2. Assertion (A): Turmeric paper can be used to identify basic substances but not acidic ones.
Reason (R): Turmeric remains yellow in both acidic and neutral media but turns red in basic medium.
Options:
(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, and R is also false.
Answer: (a) Both A and R are true, and R is the correct explanation of A.
Explanation: Turmeric is a natural indicator that reacts only with basic substances.
Difficulty Level: Moderate to Tough
Q3. Assertion (A): Red rose extract turns green when added to a basic solution.
Reason (R): Red rose extract acts as an acid-base indicator by showing colour changes depending on the substance’s nature.
Options:
(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, and R is also false.
Answer: (a) Both A and R are true, and R is the correct explanation of A.
Explanation: The colour change is a characteristic response of red rose extract to basic solutions.
Difficulty Level: Tough
Q4. Assertion (A): Ant bites can be neutralised using baking soda.
Reason (R): Baking soda is a base, and it neutralises the formic acid injected by the ant.
Options:
(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, and R is also false.
Answer: (a) Both A and R are true, and R is the correct explanation of A.
Explanation: This is a direct application of neutralisation reactions in everyday life.
Difficulty Level: Moderate
Q5. Assertion (A): When acidic and basic substances are mixed in correct proportions, the resulting solution is neutral.
Reason (R): A neutralisation reaction produces salt and water with the release of heat.
Options:
(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, and R is also false.
Answer: (a) Both A and R are true, and R is the correct explanation of A.
Explanation: Neutralisation is a key reaction between acids and bases that results in salt and water.
Difficulty Level: Moderate to Tough
Also check
- Curiosity Class 7 Science Chapter 10 Life Processes in Plants Assertion Reason Questions
- Curiosity Class 7 Science Chapter 9 Life Processes in Animals Assertion Reason Questions
- Curiosity Class 7 Science Chapter 8 Measurement of Time and Motion Assertion Reason Questions
- Curiosity Class 7 Science Chapter 7 Heat Transfer in Nature Assertion Reason Questions
- Curiosity Class 7 Science Chapter 6 Adolescence: A Stage of Growth and Change Assertion Reason Questions
- Curiosity Class 7 Science Chapter 5 Changes Around Us: Physical and Chemical Assertion Reason Questions
- Curiosity Class 7 Science Chapter 4 The World of Metals and Non-metals Assertion Reason Questions
- Curiosity Class 7 Science Chapter 3 Electricity: Circuits and their Components Assertion Reason Questions
- Curiosity Class 7 Science Chapter 2 Exploring Substances: Acidic, Basic, and Neutral Assertion Reason Questions
- Curiosity Class 7 Science Chapter 1 The Ever-Evolving World of Science Assertion Reason Questions
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Topics from which assertion reason questions may be asked
- Acids and their properties
- Bases and their properties
- Neutralization reactions
Vinegar and lemon juice are everyday examples of acids!
Frequently Asked Questions (FAQs) on Exploring Substances: Acidic, Basic, and Neutral Assertion Reason Questions
Q1: What are Assertion-Reason questions in Class 7 Science?
A1: Assertion-Reason questions consist of two statements: an Assertion (A) and a Reason (R). Students must determine whether both statements are true and if the reason correctly explains the assertion.
Q2: How do I answer Assertion-Reason questions correctly?
A2: To answer correctly, follow these steps:
Check if both statements are true.
If both are true, see if the reason logically explains the assertion.
Use the standard answer choices (Both true with explanation, Both true without explanation, A true but R false, A false but R true).
Q3: What is the new Science textbook “Curiosity” for Grade 7 about?
A3: The new textbook “Curiosity” for Grade 7 Science introduces students to the world of scientific exploration and discovery. It focuses on fostering curiosity and encouraging students to ask questions, observe the world around them, and engage in hands-on activities to understand scientific concepts.
Q4: What is the best way to prepare for Assertion-Reason questions?
A4: Strengthen your understanding of concepts by studying NCERT books.
Focus on cause-effect relationships in science topics.
Practice Assertion-Reason questions regularly from worksheets, sample papers, and past exams.
Q5: Are there any online resources or tools available for practicing “Exploring Substances: Acidic, Basic, and Neutral” assertion reason questions?
A5: We provide assertion reason questions for CBSE Class 7 Science on our website. Students can visit the website and practice sufficient case study questions and prepare for their exams. If you want to practice more assertion reason questions, you can visit physics gurukul website.
