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Class 12 Chemistry: General Principles and Processes of Isolation of Elements
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MCQs on metals occurrence, ores concentration, crude metal extraction, metallurgy thermodynamic and electrochemical principles, oxidation reduction, refining, aluminium, copper, zinc and iron uses.
 

Class 12 Chemistry: General Principles and Processes of Isolation of Elements
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25 Questions

1. Which of the following is used to reduce the metal complexes obtained during leaching process?
2. Which metal is extracted from Cinnabar?
3. Which of the following is chlorine isolated from by oxidation?
4. Which of the following statements is true?
5. Which of the following metals is not extracted by electrolysis?
6. What is the net reaction in Hall-Heroult process?
7. Which of the following metals cannot be refined by distillation?
8. What is the main reaction occurring in the blast furnace during extraction of iron from haematite?
9. What is the anode and cathode used in Hall-Heroult process?
10. What is the term given to the extraction of aluminium from bauxite by using electrochemical process?
11. What does the Ellingham diagram consist of?
12. What type of extraction is the carbon monoxide reduction process used for?
13. What is the voltage at which electrolysis of brine takes place?
14. Which of the following ores cannot be concentrated by hydraulic washing?
15. Which metal is used for making water and steam pipes?
16. Which of the following is the correct Gibbs equation?
17. Which of the following is not refined by zone refining method?
18. When is the ore subjected to leach?
19. What is the process used to recover the metal from its soluble complex obtained after leaching?
20. What is the name of the alloy of copper called which contains a composition of 30-35% of zinc?
21. What is the role of the rotating paddle in froth floatation?
22. Silver is extracted from which of the following ore?
23. Which of the following equipment is used for concentration by hydraulic washing?
24. In thermite process, what is the reducing agent used?
25. Which of the following is a complex formed during the extraction of silver via leaching?

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