InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
What are covalent solids ? Give example and state its properties. |
|
Answer» Solution : A solid in which the constituent particles are held together by a covalent bond between adjacent atom in entire crystal forming a large network of bonds are called covalent solids. Covalent solids are also called GIANT molecules. Covalent solids are MADE of non-metallic atoms and these atoms are bound by covalent bond. Example : Diamond, silicon carbide, silica (quartz) etc. Properties of covalent solids : Covalent bonds are strong and directional and therefore atoms are held very strongly at their positions and as a RESULT these solids are very hard and BRITTLE. They have extremely high melting points and may even decompose before melting. They are electrical insulators (Except: graphite) because of ABSENCE of free electrons. 
|
|