12TH CLASS CHEMISTRY(SOLID STATE)

IMPORTANT QUESTION 

 1.Why crystalline solids are anisotropic in nature?

 2.Which point defects in crystal does not alter the density of the             relevant solid.

 3.What are n-type semiconductors?

 4. Why amorphous solids are isotropic in nature?

 5. Why glass are pseudo solids?

6. What is the difference between glass and quartz as both made up of slilica (SiO2)? 

7. Which covalent or network solid is soft and good conductor? 

8. Why helium solid as helium is an atom?

 9. Which type of solid is conductor in solid as well as in liquid state?

 10. Which type of force exist in NaCl solid? 

11. TiO2 is well known example of which system?

12. Which is covalent solid?

 (A) Fe2O3 (B) Diamond (C) Graphite (D) All of these 

13. Graphite is an example of 

(A) Ionic solid          (B) Covalent solid  (C) Metallic Solid

14. What type of stoichmetric defects is shown by AgBr & Agl?