NCERT Book PDF Class 11 Physics Chapter 12 Kinetic Theory

Download the Class 11 Physics Chapter 12 Kinetic Theory NCERT Book PDF, the official 2026-27 NCERT textbook chapter. It links the behaviour of gases to the motion of molecules and explains temperature, pressure and specific heat at the microscopic level for the Boards, JEE Main, JEE Advanced and NEET.

• Official NCERT 2026-27 chapter, clean and print-ready.
• Covers the gas laws, kinetic theory, equipartition of energy and mean free path.
• Read it alongside the solved exercises and the formula sheet linked below.

This Class 11 Physics Chapter 12 Kinetic Theory NCERT Book PDF is the official 2026-27 NCERT text, checked page by page against the latest edition.

What Class 11 Physics Chapter 12 Kinetic Theory Covers

The chapter explains gases as large numbers of moving molecules. It moves from the molecular nature of matter and the gas laws to the kinetic model, then to equipartition, specific heat and the mean free path. The official NCERT sections are listed below.

Key Concepts You Will Study

Students should read the chapter with a pen and note each result as it appears. The ideas connect the tiny motion of molecules to the pressure and temperature you measure.

• How the gas laws of Boyle, Charles and Avogadro combine into the ideal-gas equation.
• The kinetic interpretation of pressure and the link between temperature and mean kinetic energy.
• The law of equipartition and how degrees of freedom set a gas's energy.
• Specific heat of monatomic, diatomic and polyatomic gases.
• The mean free path and what it says about how far a molecule travels.

Why Download the NCERT Book PDF for This Chapter

The NCERT textbook is the single most important source for the CBSE exam, and most JEE and NEET questions from this chapter are built directly on its examples.

• Every Board question on rms speed and specific heat comes from this text.
• The worked examples show the correct way to use the kinetic-theory results.
• Reading offline from the PDF avoids missing any derivation or assumption.

How to Use the NCERT Book PDF for Kinetic Theory

Read the chapter once fully, then work through it a second time with the exercises open. A short, ordered plan keeps the derivations and assumptions clear.

• Read each section, then write its key result in your own words in a single line.
• List the assumptions of the ideal gas before you follow the pressure derivation.
• Solve the in-text examples before looking at the given solution.
• Attempt the back exercises, then check them against the NCERT Solutions below.

Other Class 11 Physics Kinetic Theory Resources

Pair the textbook PDF with the solved answers, revision notes and formula sheet for the same chapter.

FAQs on Class 11 Physics Chapter 12 NCERT Book PDF