NCERT Class 12 Books Chemistry Unit 1- The Solid State

Safalta Expert Published by: Noor Fatima Updated Wed, 29 Jun 2022 01:39 PM IST


Here is the information about NCERT Books Class 12 Chemistry Unit1. You can give a read to this blog and get PDFs of the subject. 

NCERT Class 12 Books Chemistry Unit 1- The Solid State is accessible here for download purposes. You can download the PDF for and learn from the book anytime you want. Students who are studying in Class 12 and candidates who are preparing for competitive exams can download the PDF for NCERT Class 12 Books Chemistry Unit 1- The Solid State to learn from the reading material.  

Taking these course books as a reference can be really helpful to prepare for any sought exam. You can keep the digital form of the book handy and learn from it without any time constraints.

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Here, you can learn the NCERT Class 12 Books Chemistry Unit 1- The Solid State. Moreover, you can get the links for other chapters to download the links.
The Chapter Goes Like This-


After studying this Unit, you will be able to-
  • Describe general characteristics of solid state;
  • Distinguish between amorphous and crystalline solids
  • Classify crystalline solids on the basis of the nature of binding forces
  • Define crystal lattice and unit cell
  • Explain close packing of particles
  • Describe different types of voids and close packed structures
  • Calculate the packing efficiency of different types of cubic unit cells
  • Correlate the density of a substance with its unit cell properties
  • Describe the imperfections in solids and their effect on properties
  • Correlate the electrical and magnetic properties of solids and their structure
From our earlier studies, we know that liquids and gases are called fluids because of their ability to flow.

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The fluidity in both of these states is due to the fact that the molecules are free to move about. On the contrary, the constituent particles in solids have fixed positions and can only oscillate about their mean positions. This explains the rigidity in solids. These properties depend upon the nature of constituent particles and the binding forces operating between them. The correlation between structure and properties helps in the discovery of new solid materials with desired properties. For example, carbon nanotubes are new materials that have potential to provide material that are tougher than steel, lighter than aluminium and have more conductive property than copper. Such materials may play an expanding role in future development of science and society. Some other materials which are expected to play an important role in future are high temperature superconductors, magnetic materials, biodegradable polymers for packaging, biocompliant solids for surgical implants, etc. Thus, the study of this state becomes more important in the present scenario.

In this Unit, we shall discuss different possible arrangements of particles resulting in several types of structures and explore why different arrangements of structural units lend different properties to solids. We will also learn how these properties get modified due to the structural imperfections or by the presence of impurities in minute amounts.

General General Characteristics of Solid State

In Class XI you have learnt that matter can exist in three states namely, solid, liquid and gas. Under a given set of conditions of temperature and pressure, which of these would be the most stable state of a given substance depends upon the net effect of two opposing factors. These are intermolecular forces which tend to keep the molecules (or atoms or ions) closer, and the thermal energy, which tends to keep them apart by making them move faster. At sufficiently low temperature, the thermal energy is low and intermolecular forces bring them so close that they cling to one another and occupy fixed positions. These can still oscillate about their mean positions and the substance exists in solid state. The following are the characteristic properties of the solid state:

(i) They have definite mass, volume and shape.

(ii) Intermolecular distances are short.

(iii) Intermolecular forces are strong.

(iv) Their constituent particles (atoms, molecules or ions) have fixed positions and can only oscillate about their mean positions.

(v) They are incompressible and rigid.
You can download the complete book from the link given below. 

NCERT Class 12 Books Chemistry Unit 1- The Solid State
- PDF Download

Unit 1: Solid State

अध्याय 1: ठोस अवस्था

Where can you download NCERT Class 12 Books Chemistry Unit 1 PDF?

Candidates can download NCERT Class 12 Books Chemistry Unit 1- The Solid State PDF for free on our page. Links are given below. 

Unit 1: Solid State

अध्याय 1: ठोस अवस्था

Why is NCERT Class 12 Books Chemistry the best study material?

The book can also help in clarifying doubts. Other benefits of studying from the NCERT Class 12 Books Chemistry are-
  • Students gain profound knowledge about Chemistry through the NCERT Class 12 Books Chemistry
  • The course books contain pictures that can help students in better understanding of the chapters
  • These books can help students in self-study

Why is NCERT Class 12 Books Chemistry so recommended for board exams?

Almost all the questions that appear in board exams are from NCERT Class 12 Books Chemistry. Moreover, a team of professional teachers drafts these books, which become a reliable source of study for students.

Are CBSE Books for Class 12 Chemistry important from an examination perspective?

The chapters in CBSE Books for Class 12 Chemistry are vital for board exams and higher classes. Students should read the Unitgiven in the CBSE books for Class 12 Science. These stories and practice questions can help gain excellent marks.

To get outstanding marks, we provide mock test papers that can help gear-up your preparations for exams. Additionally, you can also download e-books to get yourself prepared even in a better way.

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