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Name two metals which exist in the nativ...

Name two metals which exist in the native or free state.

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Gold, platinium
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MODERN PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-Revision Exercises(One word/Short sentence Answer)
  1. Name two important ores of iron.

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  2. Write the names and formulae of two ores of aluminium.

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  3. Name two metals which exist in the native or free state.

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  4. Describe the principle of froth flotation process. What is the role of...

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  5. Define aluminothermy.

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  6. CHROMATOGRAPHY

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  7. What type of ores are roasted?

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  8. Name the method of metal refining which is generally used when a metal...

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  9. Name the sulphide ores of (i) zinc (ii) lead.

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  10. Name two ores which are concentrated by froth floatation method.

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  11. Write reduction reaction occuring in the blast furnace in the metallur...

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  12. What are ores ? Name one sulphide ore.

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  13. Why Al cannot be reduced by carbon?

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

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  15. What is the role of depressant in froth floatation process?

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  16. The method of zone refining of metals is based on the principle of :

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  17. What is the role of graphite in the electrometallurgy of aluminium ?

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  18. Give an important ore each of zinc and magnesium.

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  19. What is the composition of 'Copper matte'?

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  20. Why is the extraction of copper from pyrites more difficult than that ...

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