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Mention the steps carried out for the ex...

Mention the steps carried out for the extraction of zinc from its carbonate ore. Write the chemical reactions involved.

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i.Zinc carbonate is heated strongly in limited supply of air to convert it to oxide. This process is called calcination.
`underset"Zinc oxide"(ZnCO_(3(s))) overset"Heat"to underset"Zinc oxide"(ZnO_((s))) + underset"Carbon dioxide"(CO_2 uarr) `
Zinc oxide is then reduced to zinc by heating it with carbon.
`underset"Zinc oxide"(ZnO_((s))) + underset"Carbon"(C_((s))) overset"Heat"to underset"Zinc"(Zn_((s))) + underset"Carbon monoxide"(CO uarr)`
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TARGET PUBLICATION-METALLURGY-ANSWER THE FOLLOWING
  1. In which form do the moderately reactive metals occur in nature?

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  2. Why should the metal sulphides and carbonates be converted to metal ox...

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  3. Mention the steps carried out for the extraction of zinc from its carb...

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  4. Giving examples differentiate between roasting and calcination.

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  5. Give any four examples of moderately reactive metals.

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  6. 3MnO2 + 4Al to 3Mn + 2Al2O3 + Heat Identify the substances undergo...

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  7. What is a thermite reaction? Explain with the help of an equation.stat...

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  8. How is copper metal extracted from its sulphide ore ?

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  9. Draw a concept map to show the steps to extract metals of medium and l...

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  10. State the difference between highly reactive metals and less reactive ...

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  11. Give two examples of less reactive metals

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  12. REFINING OF METALS

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  13. Why do new iron sheets appear shiny?

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  14. What is galvanization? What purpose is served by it?

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  15. Write a short note on: Tinning

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  16. Write a note based on the diagram given below.

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  17. What is electroplating ?

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  18. In two methods of control of corrosion of aluminium, either a layer of...

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  19. What is an alloy ? Give two examples of alloys

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  20. Alloys are prepared by mixing a metal with other metals or nonmetals i...

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