NCERT Solutions For Class 11 Physics Chapter 13 PDF: Chapter 13 Kinetic Theory deals with the molecular nature of matter and how gases behave. This chapter also explores the concepts of Specific heat capacity along with theories that explain the Law of equipartition of energy. The solutions provided in this article will help you understand these concepts better so that you can perform well in your exams.
Through this article, we aim to provide the best NCERT Solutions for Class 11 Physics Kinetic Theory PDF in the market. These solutions are well versed with explanations, therefore, students will be able to understand them and solve the questions easily. We will be providing the pdf of the chapter in which all the questions will be solved. Students will be able to download the pdf for easy accessibility.
NCERT Solutions For Class 11 Physics Chapter 13: Kinetic Theory
Class 11 Physics Chapter 13 Kinetic Theory has 7 topics including the introduction of the chapter. These topics deal with the Kinectic Theory, Specific Heat, Mean Free Path and other concepts that apply to gases. We have tabulated the topics down below:
|13.2||Molecular Nature of Matter|
|13.3||Behaviour of Gases|
|13.4||Kinetic Theory of an Ideal Gas|
|13.5||Law of Equipartition of Energy|
|13.6||Specific Heat Capacity|
|13.7||Mean Free Path|
NCERT Solutions For Class 11 Physics Chapter 13 PDF Download
Class 11 Physics Chapter 13 Kinetic Theory teaches you that the properties of gases are easier to understand than those of solids and liquids. This is mainly because in a gas, molecules are far from each other and their mutual interactions are negligible except when two molecules collide. Gases at low pressures and high temperatures much above that at which they liquefy (or solidify) approximately satisfy a simple relation between their pressure, temperature, and volume.
Through this CBSE NCERT Class 11 Physics Chapter 13, you will also know that a gas that satisfies exactly at all pressures and temperatures is defined to be an ideal gas. An ideal gas is a simple theoretical model of a gas. No real gas is truly ideal. At low pressures or high temperatures, the molecules are far apart and molecular interactions are negligible. Without interactions, the gas behaves like an ideal one. Students will be able to download the solutions through the link below:
NCERT Solutions For Class 11 Physics Chapter 13: Kinetic Theory
The kinetic theory of gases is based on the molecular picture of the matter. A given amount of gas is a collection of a large number of molecules that are in incessant random motion. At ordinary pressure and temperature, the average distance between molecules is a factor of 10 or more than the typical size of a molecule. This the interaction between the molecules is negligible and we can assume that they move freely in straight lines according to Newton’s first las.
However, occasionally, they come close to each other, experience intermolecular forces and their velocities change. These interactions are called collisions. The molecules collide incessantly against each other or with the walls and change their velocities. The collisions are considered to be elastic. We can derive an expression for the pressure of a gas-based on the kinetic theory.
If you wish to get the solutions for other chapters as well you may click the below links and get the solutions in the same format.
|NCERT Solutions for Class 11 Physics Chapter 12||NCERT Solutions for Class 11 Physics Chapter 14||NCERT Solutions for Class 11 Physics (All Chapters)|
Important Questions On NCERT Physics Class 11 Chapter 13 Kinetic Theory
Here well will be providing some important questions form the chapter so that students can get a rough idea as to how the questions are framed throughout the chapter.
|Short Answer Types Questions|
1. Estimate the fraction of molecular volume to the actual volume occupied by oxygen gas at STP. Take the diameter of an oxygen molecule to be 3 Å.
2. Molar volume is the volume occupied by 1 mol of any (ideal) gas at standard temperature and pressure (STP: 1 atmospheric pressure, 0 °C). Show that it is 22.4 litres.
|Long Answer Types Questions|
1. What will be the the average thermal energy of a helium atom at the following:
(a) At 27°C or Room Temperature
(b) On the surface of the Sun – 6000K
(iii) The temperature of 10 million kelvin (the typical core temperature in case of a star)
2. Estimate the total number of air molecules (inclusive of oxygen, nitrogen, water vapour and other constituents) in a room of capacity 25.0 m3 at a temperature of 27°C and 1 atm pressure.
|Very Long Answer Types Questions|
1. A gas in equilibrium has uniform density and pressure throughout its volume. This is strictly true only if there are no external influences. A gas column under gravity, for example, does not have uniform density (and pressure). As you might expect, its density decreases with height. The precise dependence is given by the so-called law of atmospheres n2 = n1 exp [ -mg (h2 – h1)/ kBT] where n2, n1 refer to number density at heights h2 and h1 respectively. Use this relation to derive the equation for sedimentation equilibrium of a suspension in a liquid column: n2 = n1 exp [ -mg NA (ρ – P′ ) (h2 –h1)/ (ρ RT)] where ρ is the density of the suspended particle, and ρ’ that of surrounding medium. [NA is Avogadro’s number, and R the universal gas constant.] [Hint : Use Archimedes principle to find the apparent weight of the suspended particle.]
2. From a certain apparatus, the diffusion rate of hydrogen has an average value of 28.7 cm3 s–1. The diffusion of another gas under the same conditions is measured to have an average rate of 7.2 cm3 s–1. Identify the gas. [Hint : Use Graham’s law of diffusion: R1/R2 = ( M2 /M1 )1/2, where R1, R2 are diffusion rates of gases 1 and 2, and M1 and M2 their respective molecular masses. The law is a simple consequence of kinetic theory.]
How To Prepare For NCERT Class 11 Physics Chapter 13?
This chapter requires students to study lots of definitions, chemical formulas, and remember equations. To prepare this chapter students can follow the tips given below:
- Start by preparing a formula and theorem notebook.
- Read the topics and solve questions based on each topic.
- Try to understand the concepts.
- Take help of the NCERT solutions provided in this article.
- Solve sample papers and take mock tests.
Now that you have the study material as well as the preparation tips. We suggest you start preparing the chapter if you are preparing for competitive exams you can check the below link:
Check the Frequently Asked Questions on NCERT Solutions for Class 11 Physics Chapter 13
Q1. How can I score full marks in Chapter 13 – Kinetic Theory of NCERT Solutions for Class 11 Physics?
Besides solving the textbook questions, students can refer to the solutions curated by experts at Embibe to get an idea about the topics covered in this chapter. Furthermore, the PDF format of solutions is available, which can be downloaded and used by the students to clarify their doubts instantly.
Q2. How to start reading NCERT Solutions for Class 11 Physics Chapter 13?
This article intends to provide the best NCERT Solutions for Class 11 Physics Kinetic Theory PDF for students. These solutions, well defined with explanations. So, students will be able to understand them and solve the questions quickly. Furthermore, students can download the pdf for easy accessibility.
Q3. Explain the kinetic theory of gases covered in NCERT Solutions for Class 11 Physics Chapter 13?
The kinetic theory of gases is a theoretical model that explains the molecular structure of the gas in terms of a vast number of submicroscopic particles, which include atoms and molecules. The solutions are prepared with the primary purpose of preparing CBSE students with their exam syllabus. Furthermore, the explanations of the solutions are present in simple language to boost the confidence in students for writing the exam without fear.
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