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At a site, low grade copper ores are ava...

At a site, low grade copper ores are available and zinc and iron scraps are also available. Which of the two scraps would be more suitable for reducing the leached copper ore and why?

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Zinc, since copper is less electropositive `(E^(Ɵ)=0.34 V)` than zinc `(E^(Ɵ) = -0.76 V)`. Hence, zinc can readily displace copper from its salt solutions.
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ICSE-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -EXERCISE (PART-II ( DESCRIPTIVE QUESTIONS )) (VERY SHORT ANSWER QUESTIONS)
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  2. Write a balanced equation for the reaction of argentite with KCN and n...

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  3. In moist air, copper corrodes to produce a green layer on the surface....

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  4. In which of the following cases flux is required? (i) In the smelti...

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  5. What is anode mud" in connection with the metallurgy of copper? What i...

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  6. What is the percentage of silver in German silver'?

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  7. Arrange in descending order of carbon content: Stainless steel, mild s...

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  8. Name a metal which may be extracted from the respective ore by both el...

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  9. What is the composition of Copper matte.

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  10. What is meant by self-reduction process?

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  11. An ore sample of galena (PbS) is contaminated with zinc blende (ZnS). ...

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  12. The extraction of Au by leaching with NaCN involves both oxidation and...

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  13. Why is the froth flotation method selected for the concentration of su...

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  14. What is meant by the term pyrometallurgy?

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  15. At a site, low grade copper ores are available and zinc and iron scrap...

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  16. Why is electrolytic reduction preferred over chemical reduction for th...

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  17. Copper matte is charged into a silica lined converter in extraction of...

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  18. What is the role of collectors in froth floatation process ?

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  19. On what principle is chromatography based ?

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  20. What is the role of cryolite in the extraction of pure aluminium from ...

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