Imperfections in crystals Test - The Solid State Class 12 Notes | EduRev

Class 12 : Imperfections in crystals Test - The Solid State Class 12 Notes | EduRev

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CBSE TEST PAPER-04 
CLASS - XII CHEMISTRY (The Solid State) 
Topic – imperfections in crystals 
1. What is the meaning of term ‘defect’ with reference to crystal? [1] 
2. Define two main types of defects. [2] 
3. Name the types of point defect. [1] 
4. (a) Identify the defect in figure below : [2] 
(b) How does it affect the density of crystal?
(c) Give an example of crystal where this defect can be found.
(d) What is its effect on electrical neutrality of crystal?
5. Which defect is observed in a solid solution of CdCl 2 and AgCl? Explain. [2] 
6. Excess of lithium makes LiCl crystal pink. Explain. [2] 
7. What are F centres? [1] 
8. How does a crystal changes due to presence of F centre? [1] 
9. Give an example which shows both frenkel and Schottky defect. [1] 
10. Which type of ionic substances show? [2] 
(a) Schottky defect
(b) Frenkel defect
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