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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 not an impurity generally present in crude metals?
2. What is the type of metallurgy in which the ore is leached and the metal is collected by using electrolysis?
3. Which of the following processes involves the dissolution of the ore in a suitable reagent followed by precipitation of the metal by a more reactive metal?
4. In thermite process, what is the reducing agent used?
5. What is the process used to recover the metal from its soluble complex obtained after leaching?
6. Which of the following are collectors used in the froth floatation process?
7. Which of the following metals is a good conductor of electricity and conducts electricity twice as much as the other elements?
8. What does the Ellingham diagram consist of?
9. Which of the following is the finest iron ore?
10. How is ore-dressing of iron done?
11. What is the property of necessary for an ore to be concentrated by electrostatic separation?
12. Which of the following is false regarding the Ellingham diagram?
13. What is the anode made up of in electrolytic refining?
14. How can a reaction with positive ΔG be made to occur?
15. What is the anode and cathode used in Hall-Heroult process?
16. Which of the following is the correct Gibbs equation?
17. Which of the following metals is not extracted by electrolysis?
18. Which of the following is not refined by zone refining method?
19. Which of the following ores cannot be concentrated by hydraulic washing?
20. Which metal is used for making water and steam pipes?
21. What is the main reaction occurring in the blast furnace during extraction of iron from haematite?
22. What is the name of the alloy of copper called which contains a composition of 30-35% of zinc?
23. Under what condition can Al reduce MgO?
24. What is the concentration of zinc in calamine?
25. Which of the following is used to reduce the metal complexes obtained during leaching process?

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