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Which of the following reduction reactio...

Which of the following reduction reactions are actually employed in commercial extraction of metals ?

A

`Fe_(2)O_(3) + 2Al rarr Al_(2)O_(3) + 2Fe `

B

`Cr_(2)O_(3) + 2Al rarr Al_(2)O_(3) + 2Cr`

C

`2"Na"["Au"(CN)_(2)] + "Zn" rarr Na_(2)["Zn"(CN)_(4)] + 2"Au"`

D

`CuS + 2CuO rarr 3Cu + SO_(2) uparrow `

Text Solution

Verified by Experts

The correct Answer is:
b,c
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NARAYNA-METTALURGY-Multiple answer
  1. The disadvantage of carbon reduction method are :

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  2. The funciton of adding cryolite in the electrolytic reduction of alumi...

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  3. Which of the following reduction reactions are actually employed in co...

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  4. Select correct statement regrading silver extraction//purification pro...

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  5. Aluminothermy used for on the spot welding of large iron structures is...

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  6. Highly electropositive metals can not be extracted by carbon reduction...

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  7. When ZnS and PbS minearls are present together, then NaCN is added to ...

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  8. The reaction (s) which does (do) not occur in the reduction zone in th...

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  9. Which of the following reaction(s) take place in Bessemer converter f...

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  10. In the extraction of aluminium metal , one of the process is summarise...

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  11. During the production of iron and steel.

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  12. For which of the following metal, the carbon reduction cannot be used ...

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  13. The advantage(s) of using carbon to reduce a number of oxides and othe...

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  14. The disadvantage of carbon reduction method are :

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  15. The funciton of adding cryolite in the electrolytic reduction of alumi...

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  16. Which of the following reduction reactions are actually employed in co...

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  17. Select correct statement regrading silver extraction//purification pro...

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  18. Aluminothermy used for on the spot welding of large iron structures is...

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  19. Highly electropositive metals can not be extracted by carbon reduction...

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  20. NaCN is sometimes added in the frouth flotation process as a depresant...

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