Types of Solids

             +2 Chemistry ഒന്നാം പാഠമായ Solids ന്റെ  Types of Solids  എന്ന ഭാഗം പഠിക്കുന്നതിനു സഹായകമായ വീഡിയോയും , പഠന ശേഷം വിലയിരുത്തലിനു ACTA തയ്യാറാക്കിയ   ഒരു ടെസ്റ്റ് പേപ്പറും ഇതിൽ ഉൾക്കൊള്ളിച്ചിരിക്കുന്നു. താഴെ നൽകിയിരിക്കുന്ന മൂന്ന് ലിങ്കുകളിൽ ക്ലിക്ക് ചെയ്യുകയോ ടച്ച് ചെയ്യുകയോ ചെയ്താൽ അതാതു റിസോർസ് നിങ്ങൾക്ക് ലഭ്യമാകും
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Types of Solids

The solids are of two types : Crystalline solids and amorphous solids.

To learn more about the Types of Solids from the chapter Solids of +2 Chemistry Watch the following video

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Test Paper

1.Solids can be classified as crystalline or amorphous on the basis of the
nature of order present in the arrangement of their constituent particles.

2.A crystalline solid has long range order which means that there is a regular pattern of arrangement of particles which repeats itself periodically over the entire crystal. Sodium chloride and quartz are typical examples of crystalline
solids.

3.An amorphous solid consists of particles of irregular shape. The arrangement of constituent particles (atoms, molecules or ions) in such a solid has only short range order or the arrangement is disordered.

4.The structures of quartz (crystalline) and quartz glass (amorphous) are shown
in Text book Fig. 1.1 (a) and (b) respectively. While the two structures are almost identical, yet in the case of amorphous quartz glass there is no long range order.

5.The structure of amorphous solids is similar to that of liquids. Glass, rubber and plastics are typical examples of amorphous solids.


6.On heating amorphous solids become crystalline at some temperature. Some glass objects from ancient
civilisations are found to become milky in appearance because of some crystallisation.

7.Like liquids, amorphous solids have a tendency to flow, though very slowly. Therefore, sometimes these are called pseudo solids or super cooled liquids

8.Glass panes fixed to windows or doors of old buildings are invariably found to be slightly thicker at the bottom than at the top. This is because the glass
flows down very slowly and makes the bottom portion slightly thicker.

9.Crystalline solids are anisotropic in nature, that is, some of their physical properties like electrical resistance or refractive index show different values when measured along different directions in the same crystals. This arises from different arrangement of particles in different directions

10.Amorphous solids on the other hand are isotropic in nature. It is because there is no long range order in them and arrangement is irregular along all the directions. Therefore, value of any physical property would be same along any direction