NCERT Solutions for Class 11 Physics Chapter 13

NCERT Solutions for Class 11: Physics Chapter 13 – Kinetic Theory

NCERT Solutions for Class 11:  Physics Chapter 13 provide detailed explanations and accurate solutions to key concepts that students must refer to, in order to ace their term tests, final exams as well as competitive exams at a later stage.

NCERT Class 11:  Physics Chapter 13 : Kinetic Theory covers some of the most important ideas, such as different scientists’ gas laws, atomic theory, the importance and applications of constant values like the Boltzmann constant and Avogadro’s number, kinetic theory postulates, and specific heat capacities.

Learning these subjects is crucial because the second term exam may have questions based on these concepts. Additionally, with these subjects, students will have a strong foundation that will  definitely help them in their next academic session. NCERT Solutions, which are available on Extramarks, provide  access to in-text and end-text exercises as well as additional study resources.

NCERT Solutions For Class 11 Physics Chapter 13

 Solutions will not only help in preparing notes and framing excellent answers but will also boost their confidence. These solutions follow the latest CBSE guidelines  and also include suggested questions for your final and entrance test exams. Access NCERT Solutions for Class 11 Physics Chapter 13 from Extramarks to find these study resources offline and enjoy  the hassle free  and non-stop learning experience.

NCERT  Class 11: Kinetic Theory

In Class 11, Kinetic Theory is one of the highest scoring chapters. Gas properties are simpler to comprehend than those of solids and liquids. All the objects are made up of atoms, which are tiny particles that move around in a constant state of motion, attracting one another when they are separated by a little distance but repelling when pushed together. The following are some key points from the kinetic theory of gases.

  • In a gas, we should not have an exaggerated notion of intermolecular distance. This is only around 10 times the interatomic distance in solids and liquids at ordinary pressures and temperatures.  This means, that the free path, which is 100 times the interatomic distance and 1000 times the molecule’s size in gas, is different.
  • A fluid’s pressure isn’t just exerted on the wall. In a fluid, pressure exists everywhere. Because the pressure on both sides of the layer is equal, any layer of gas inside the volume of a container is in equilibrium.
  • Because of their rapid speed and constant collisions, air molecules in a room do not fall and settle on the ground (due to gravity). At lower heights, there is a very modest rise in density in equilibrium (like in the atmosphere).

NCERT Solutions For Class 11 Physics Chapter 13 

It is crucial  that you understand the principles presented in Chapter 13 Kinetic Theory so that you do not have any difficulty understanding the advanced topics you will come across in higher classes. NCERT Solutions will help you gain a deeper understanding of the study material by providing answers to textbook problems as well as questions from sample papers and model question papers.

NCERT Solutions also include past years’ questions, which are quite helpful in preparing for the CBSE examinations for the years 2022-23.

 NCERT Solutions for Class 11 Physics Chapter 13 Sub – Topics

You can have a clear picture of the principles taught in Kinetic Theory of Gases Class 11 by reading the summary of all seven topics covered in the chapter provided below.

Part 1: Introduction

Before  getting into the details, the first section lays out the fundamentals of the Kinetic Theory of Gases and how it was developed. Students will study the structure and contents of gas molecules, as well as their characteristics and thermodynamic behaviour when contrasted with liquids and solids. Questions about terminology like conduction, viscosity, diffusion, and specific heat capacities have been thoroughly addressed in NCERT Solutions Class 11 Physics Chapter 13 Kinetic Theory.

Part 2: Molecular Nature of Matter

This section goes into the molecular behaviour of gases in greater depth. It includes the Atomic Theory as well as its principles. Interatomic spaces, mean free paths, and dynamic equilibrium of gases have all been emphasised. Students will be expected to comprehend Gay Loussac’s Law and Avogadro’s Law, as well as their relationship.

Part 3: Behaviour of Gases

The title concept of Kinetic Theory of Gases, as well as its postulates, are introduced here. This section covers key terms and ideas such as the Boltzmann constant and Avogadro’s number, as well as its applications in determining temperature, pressure, and volume of gases. You’ll also have to work out difficulties with mole number and molar mass.

Part 4: Kinetic Theory of an Ideal Gas

This section is further divided into two subsections, each of which expands on the previously established concepts and relationships in light of specific circumstances.

  • Pressure of an Ideal Gas

The momentum and, finally, the pressure of gas particles may be calculated using their fixed velocities. There is a full explanation of Pascal’s Law.

  • Kinetic Interpretation of Temperature

With the help of the Boltzmann constant, the link between kinetic energy, pressure, and temperature is calculated using the ideal gas equation and preceding derivations.

Examples and activities relating to the above-mentioned ideas are included in Chapter 13 Physics Class 11 NCERT Solutions to reinforce the equations and derivations for quick and efficient learning.

Part 5: Law of Equipartition of Energy

Before defining the Law of Equipartition of Energy, this portion covers some of the key concepts of vibrational energy of molecules, rotational vibration, the moment of inertia, and degrees of movement of gas particles.

Part 6: Specific Heat Capacity

In the computations of molar-specific heat capacity of gases, solids, and water at constant volume (cv) and constant pressure, the Law of Equipartition Energy is utilised (cp). There are also suggestions for avoiding gaps between projected and experimental specific heat capacity values. The relevance of quantum physics and its use in numerical problems is conveyed in physics chapter 13 class 11 NCERT Solutions.

Part 7: Mean Free Path

The final subtopic in Kinetic Theory of Gases Class 11 Physics defines the term Mean Free Path and illustrates how it works with real-life examples. It is also calculated using a formula based on the size, density, and the number of gas molecules. In Kinetic Theory of Gases Class 11 Physics NCERT Solutions, students will discover a well-explained numerical based on the formula that will help them improve their problem-solving skills.

FAQs (Frequently Asked Questions)

Students can refer to the website of Extramarks or its mobile application to get accurate answers to questions asked at the end of Chapter 13 Physics. Additional practise questions are also added in the solutions for students to assist them to understand the concepts. . The extra questions are derived from past years’ papers from various schools. All of the answers are provided in accordance with the CBSE board’s most recent guidelines and are available on the Extramarks website.

The basic macroscopic properties of gases, such as volume, pressure, and temperature, as well as some transport properties, such as viscosity and thermal conductivity, are explained by the kinetic theory of gases. Because gases are made up of fast-moving atoms and molecules, it gives a basic notion of how they behave. This is conceivable because, in gases, the short-range interatomic forces that are so important in solids and liquids may be ignored.

The following are the five assumptions:

  • Gases are made up of an endless number of particles known as molecules that travel in different directions at random.
  • The distance between the two molecules is larger than the molecules’ individual sizes.
  • The collision between the two molecules and their environment has a very short time interval.
  • The laws of motion apply to all the molecules in the gas.
  • Between the molecules, only elastic collisions exist.

 

Kinetic Theory provides a basic understanding of the behaviour of gases because they are made up of fast-moving atoms or molecules. In the nineteenth century, Maxwell, Boltzmann, and others proposed the kinetic theory of gases. An ideal gas is one that strictly follows gas laws such as Charles’, Boyle’s, and Gay Lussac’s law. There is no force of attraction or repulsion in the ideal gas molecule since it is a point mass.

Our highly experienced faculty has curated NCERT Solutions for Class 11 Physics Chapter 13 Kinetic Theory after completing an extensive study on each concept. Students can use these solutions to acquire a general sense of the concepts covered in this chapter while working on the textbook questions. Students can access the solutions both online and offline, depending on their needs. At Extramarks, solutions are provided in an easy-to-understand and simple format, which students can easily access to clarify their doubts and understand how to write accurate, precise answers to the questions. Since Extramarks follows the NCERT syllabus, it also prepares the students for competitive exams.