NCERT Solutions for Class 11 Chemistry, Chapter 5 - States of Matter

In this chapter, you’ll study about different states of matter. You’ll learn about solid, liquid and gas and how atoms and molecules behave in these states. You’ll also study the existence of solid, liquid and gas with respect to their intermolecular forces and thermal energy. Besides, you’ll learn what ideal gases, the behaviour of real gases are, the difference between vapours and gaseous state; understand the characteristics of liquids with respect to their intermolecular attractions. You’ll also come across four important Gas Laws and theories behind these.

Thus, an in-depth study of Class 11 Chemistry NCERT Solutions Chapter 5 will give you a good understanding of different states of matter.

Let’s take a look at topics and sub-topics of Class 11 Chemistry Chapter 5 – States of Matter

5.1 Intermolecular Forces

5.1.1 Dispersion Forces or London Forces

5.1.2 Dipole-Dipole Forces

5.1.3 Dipole–Induced Dipole Forces

5.1.4 Hydrogen bond

5.2 Thermal Energy

5.3 Intermolecular Forces vs Thermal Interactions

5.4 The Gaseous State

5.5 The Gas Laws

5.5.1 Boyle’s Law (Pressure-Volume Relationship)

5.5.2 Charles’ Law (Temperature – Volume Relationship)

5.5.3 Gay Lussac’s Law (Pressure-Temperature Relationship)

5.5.4 Avogadro Law (Volume – Amount Relationship)

5.6 Ideal Gas Equation

5.6.1 Density and Molar Mass of a Gaseous Substance

5.6.2 Dalton’s Law of Partial Pressures

5.7 Kinetic Energy and Molecular Speeds

5.8 Kinetic Molecular Theory of Gases

5.9 Behaviour of Real Gases: Deviation from Ideal Gas Behaviour

5.10 Liquefaction of Gases

5.11 Liquid State

5.11.1 Vapour Pressure

5.11.2 Surface Tension

5.11.3 Viscosity

In Class 11 Chemistry Chapter 5, you will learn – 

Section 5.1 – In this section, you’ll study the meaning, definition and explanation of intermolecular forces, Van der Waals forces, Dispersion Forces or London Forces between atoms, Dipole-Dipole Forces, Dipole–Induced Dipole Forces, Hydrogen bond and different types of Van der Waals forces.

Section 5.2 – In this section, you will study about thermal energy and thermal motion.

Section 5.3 – In this section, you’ll learn how intermolecular forces are different from thermal interactions.

Section 5.4 – In this section, you’ll acquire knowledge about the gaseous state in detail and learn some physical properties of the gaseous state. You’ll also learn about the eleven elements that exist as gases.

Section 5.5 – In this section, you’ll study about the gas laws as stated by Robert Boyle, Charles, Gay Lussac, and the Avogadro Law.

Section 5.6 – In this section, you’ll learn about the ideal gas equation and how to combine the three gas laws to form the ideal gas equation. You’ll also learn new terms like the universal gas constant, equation of state, combined gas law, and more.

Section 5.7 – In this section, you’ll learn what is kinetic energy and molecular speed as proposed by Maxwell and Boltzmann. You will study the graph showing the number of molecules possessing very high and very low speed.

Section 5.8 – In this section, you’ll study the kinetic molecular theory of gases and assumptions or postulates related to these.

Section 5.9 – In this section, you’ll be able to answer questions like why do gases deviate from the ideal behaviour or what are the conditions under which gases deviate from ideality.

Section 5.10 – In this section, you’ll acquire knowledge about the graphical representation of Isotherms of carbon dioxide at various temperatures and study the critical constants for some substances.

Section 5.11 – In this section, you’ll learn how molecules behave in liquid state, what is vapour pressure, saturated vapour pressure, normal boiling point, standard boiling point, surface tension, viscosity and coefficient of viscosity.

In this chapter, you are provided with several examples with their solutions for clear understanding about the States of Matter. To know more about NCERT Solutions for Class 11 Chemistry Chapter 5, you should explore the exercises mentioned in this chapter. You can also download the NCERT Solutions for Class 11 Chemistry Chapter 5 PDF, solved by our science experts.