Oxidation – Reduction; Refining Test - p-Block Elements Class 12 Notes | EduRev

Class 12 : Oxidation – Reduction; Refining Test - p-Block Elements Class 12 Notes | EduRev

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CBSE TEST PAPER-04 
CLASS - XII CHEMISTRY (General principles and processes of isolation of elements) 
Topic:- Oxidation –Reduction; Refining. 
1. Give an example of extraction based on oxidation reduction. [1] 
2. How are gold and silver extracted? [2] 
3. Give two examples of metal refined by [3] 
a) Distillation
b) Liquation
c) Electrolytic refining
4. Explain electrolytic refining of copper. [2] 
5. Which method is used for refining of silicon or gallium? [1] 
6. What is the principle behind zone refining? [1] 
7. Give the requirements for vapour phase refining? [2] 
8. Write a short note on Mond’s process. [2] 
9. Which method is used for refining of zirconium? Explain. [2] 
10. What is the principle behind chromatography?
Name some types of chromatographic techniques. [2] 
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