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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 to Al_(2)O_(3)+2Fe`

B

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

C

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

D

`Cu_(2)S+PB to Cu+PbS darr`

Text Solution

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The correct Answer is:
B, C
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VK JAISWAL-METALLURGY-One OR MORE ANSWERS IS/ ARE CORRECT
  1. Which of the following is / are correctly matched ?

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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. The main reaction occuring in blast furnace during the extraction of i...

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  5. Which of the following are true for electrolytic extraction of alumini...

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

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

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

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  9. Which of the following reaction in the blast furnace is / are endother...

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  10. The funace lining in steel manufacture consists of :

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  11. Pick up the correct statement(s) :

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  12. Which of the following metal (s) is /are commercially extracted by sel...

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  13. Which of the following process makes the ore porous ?

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  14. Which of the following ores is / are oxide ore (s) ?

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  15. Roasting of copper pyrites is done :

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  16. Which of the following is a correct statement ?

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  17. In which of the following pairs, both the minerals are oxides ?

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  18. Which of the following mineral does not contain sodium ?

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  19. Which of the following pair consists of ore of the same metal ?

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  20. The process (es) by which lighter earthy particles are freed from the ...

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