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 5 Changes Around Us: Physical and Chemical.
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 | Changes Around Us: Physical and Chemical |
| 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 Changes Around Us: Physical and Chemical
Assertion Reason Questions
Q1. Assertion (A): Melting of ice and boiling of water are examples of physical changes.
Reason (R): In physical changes, the original substance remains the same, only its form or state changes.
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: No new substance is formed during melting or boiling; only the physical state changes.
Difficulty Level: Moderate
Q2. Assertion (A): When baking soda is mixed with vinegar, bubbles are formed due to the release of carbon dioxide.
Reason (R): The formation of gas and new substances during this process indicates a chemical change.
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 reaction produces carbon dioxide, a new substance, proving it’s a chemical change.
Difficulty Level: Tough
Q3. Assertion (A): Combustion of substances like wood or paper is a chemical change.
Reason (R): Combustion produces heat and light and results in the formation of new substances like ash or gases.
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: Combustion involves chemical reactions and leads to permanent changes in the original substance.
Difficulty Level: Moderate to Tough
Q4. Assertion (A): Burning of a candle shows both physical and chemical changes.
Reason (R): Melting and solidifying of wax are chemical changes, while the flame is a physical change.
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: Melting of wax is a physical change, but burning of the vapour is a chemical change.
Difficulty Level: Tough
Q5. Assertion (A): Weathering of rocks involves both physical and chemical changes over time.
Reason (R): Physical forces only change the shape of rocks; chemical reactions do not affect their colour or composition.
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: Chemical weathering alters the mineral composition and colour of rocks (e.g., iron to iron oxide).
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
- Physical changes
- Chemical changes
- Examples in daily life
Cooking food is a chemical change as it forms new substances!
Frequently Asked Questions (FAQs) on Changes Around Us: Physical and Chemical 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 “Changes Around Us” 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.
