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State the role of silica in the metallur...

State the role of silica in the metallurgy of copper.

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MODERN PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-EXERCISE
  1. Barytes is an ore of barium. True or False

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  2. Describe the method of refining of nickel.

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  3. State the role of silica in the metallurgy of copper.

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  4. Write the name of purest form of iron.

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  5. Why are sulphide ores converted to oxide before reduction ?

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  6. What is malachite? Write down its formula.

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  7. Fill in the blanks- metal alloy is used in marine engineering.

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  8. How is zinc obtained from zinc blende? Give Chemical reactions.

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  9. Fill in the blanks- is the ore from which aluminium metal is extracte...

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  10. How is Ni purified by Mond’s process?

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  11. Outline the principle of refining of metals by electrolytic refining.

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  12. How does the FeO impurity present in sulphide ore of copper is removed...

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  13. Which of the following is the ore of zinc?

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  14. Name the method used for refining of Zirconium.

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  15. Name the method of refining of metals such as germanium.

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  16. In the extraction of Al, impure Al2O3 is dissolved in conc. NaOH to fo...

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  17. What is the role of coke in the extraction of iron from its oxides?

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  18. What chemical process is used for obtaining a metal from its oxide?

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  19. Outline the principle of refining of metals by electrolytic refining.

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  20. Outline the principles involved in the following methods of refining o...

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