CBSE Class 12 Chemistry Solid State Chapter Notes

CBSE Class 12 Chemistry - Solid State Chapter Notes. Learning the important concepts is very important for every student to get better marks in examinations. The concepts should be clear which will help in faster learning. The attached concepts made as per NCERT and CBSE pattern will help the student to understand the chapter and score better marks in the examinations.  

 1: The Solid State Points to remember 

1. Solid: Solid is a state of matter in which the constituting particles are arranged very closely. The constituent particles can be atoms, molecules or ions.  

2. Properties of solids: 

a. They have definite mass, volume and shape. 

b. Intermolecular distances are short and hence the intermolecular forces are strong. 

c. Their constituent particles have fixed positions and can only oscillate about their mean positions. 

d. They are incompressible and rigid.  

3. Classification of on the basis of the arrangement of constituent particles: 

a. Crystalline solids: The arrangement of constituent particles is a regular orderly arrangement. Example: iron, copper, diamond, graphite 

b. Amorphous solids: The arrangement of constituent particles is an irregular arrangement. Example: Glass, plastics, rubber  

4. Properties of crystalline solids: 

a. They have a definite characteristic geometrical shape 

b. They have a long range order. 

c. They have a sharp melting point. 

d. They are anisotropic in nature i.e. their physical properties show different values when measured along          different directions in the same crystal. 

e. When cut with a sharp edged tool, they split into two pieces and the newly generated surfaces are plain and      smooth. 

f. They have a definite and characteristic heat of fusion 

g. They are called true solids  

5. Polymorphic forms or polymorphs: The different crystalline forms of a substance are known as polymorphic forms or polymorphs. For example: graphite and diamond. 

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