Hello students, we are providing assertion reason questions for class 11. 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 11 Physics. In this article, you will find assertion reason questions for CBSE Class 11 Physics Chapter 10 Thermal Properties of Matter. It is a part of Assertion Reason Questions for CBSE Class 11 Physics Series.
| Chapter | Thermal Properties of Matter |
| Type of Questions | Assertion Reason Questions |
| Nature of Questions | Competency Based Questions |
| Board | CBSE |
| Class | 11 |
| Subject | Physics |
| Useful for | Class 11 Studying Students |
| Answers provided | Yes |
| Difficulty level | Mentioned |
| Important Link | Class 11 Physics Chapterwise Assertion Reason |
Assertion Reason Questions on Thermal Properties of Matter
Assertion Reason Questions
Directions: Each of the following questions consists of two statements: an Assertion (A) and a Reason (R). Answer them by selecting the correct option:
(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.
Q1. Assertion (A): The temperature of a substance remains constant during its phase change.
Reason (R): Heat supplied during phase change is used to break intermolecular bonds.
Answer: Option (a) is correct.
Explanation: During melting or boiling, heat energy is absorbed but goes into breaking intermolecular attractions rather than increasing the kinetic energy of particles. So, temperature remains constant.
Difficulty Level: Moderate
Q2. Assertion (A): Metals are good conductors of heat.
Reason (R): Metals contain free electrons that transfer energy through collisions.
Answer: Option (a) is correct.
Explanation: The high thermal conductivity of metals is due to free electrons, which move rapidly and transfer energy efficiently through collisions.
Difficulty Level: Moderate
Q3. Assertion (A): Thermal expansion of solids is negligible compared to liquids.
Reason (R): Intermolecular forces in solids are stronger than in liquids.
Answer: Option (a) is correct.
Explanation: Solids expand less because atoms are held tightly by strong intermolecular forces. Liquids have weaker forces, allowing more expansion.
Difficulty Level: Moderate
Q4. Assertion (A): The specific heat of water is very low.
Reason (R): Water heats up very quickly when supplied with heat.
Answer: Option (d) is correct.
Explanation: Water actually has a high specific heat, meaning it resists changes in temperature. So both assertion and reason are incorrect.
Difficulty Level: Tough
Q5. Assertion (A): A black body is the best emitter of radiation.
Reason (R): A perfect black body absorbs all incident radiation and reflects none.
Answer: Option (b) is correct.
Explanation: While both statements are true, R explains absorption, not why emission is maximum. Emissivity equals absorptivity for a black body, hence it emits the most, but R doesn’t make that connection.
Difficulty Level: Tough
Also check
- Waves Class 11 Assertion Reason Questions Physics Chapter 14
- Oscillations Class 11 Assertion Reason Questions Physics Chapter 13
- Kinetic Theory Class 11 Assertion Reason Questions Physics Chapter 12
- Thermodynamics Class 11 Assertion Reason Questions Physics Chapter 11
- Thermal Properties of Matter Class 11 Assertion Reason Questions Physics Chapter 10
- Mechanical Properties of Fluids Class 11 Assertion Reason Questions Physics Chapter 9
- Mechanical Properties of Solids Class 11 Assertion Reason Questions Physics Chapter 8
- Gravitation Class 11 Assertion Reason Questions Physics Chapter 7
- System of Particles and Rotational Motion Class 11 Assertion Reason Questions Physics Chapter 6
- Work, Energy, and Power Class 11 Assertion Reason Questions Physics Chapter 5
- Laws of Motion Class 11 Assertion Reason Questions Physics Chapter 4
- Motion in a Plane Class 11 Assertion Reason Questions Physics Chapter 3
- Motion in a Straight Line Class 11 Assertion Reason Questions Physics Chapter 3
- Units and Measurements Class 11 Assertion Reason Questions Physics Chapter 2
Topics from which assertion reason questions may be asked
- Heat, temperature and thermal expansion
- Calorimetry and latent heat
- Newton’s law of cooling
Water has a high specific heat capacity, making it essential for regulating climate and body temperature.
Assertion reason questions from the above given topic may be asked.
Frequently Asked Questions (FAQs) on Thermal Properties of Matter Assertion Reason Questions Class 11
Q1: What is the importance of Thermal Properties of Matter in Class 11 Physics?
A1: It forms the basis for various real-life applications and is crucial for JEE/NEET level conceptual clarity.
Q2: Are assertion reason questions asked in CBSE exams?
A2: Yes, CBSE has introduced competency-based formats which include assertion reason questions to test conceptual understanding.
Q3: How to prepare assertion reason questions from Thermal Properties of Matter?
A3: Focus on key definitions, cause-effect relationships, and conceptual reasoning instead of just memorizing facts.
Q4: Can numerical topics appear in assertion reason format?
A4: Yes, concepts from numerical topics like laws, formulas, or effects of parameter change are often asked.
Q5: Where can I find more assertion reason questions on Thermal Properties of Matter?
A5: Visit xamcontent.com and physicsgurukul.com for chapterwise assertion reason question collections.
