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Extraction of copper by smelting uses si...

Extraction of copper by smelting uses silica as an additive to remove:

A

`Cu_2O`

B

`FeS`

C

`FeO`

D

`Cu_2S`

Text Solution

Verified by Experts

The correct Answer is:
C
FeO is gangue and `SiO_2` is flux to form slag `FeSi O_3`
` underset("Basic impurty ")( FeO ) + underset("acidic flux ")(SiO_2) to underset("slag")(FeSiO_3)`
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DISHA PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-EXERCISE -1: CONCEPT APPLICATOR
  1. Extraction of copper by smelting uses silica as an additive to remove:

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  2. Consider the following reactions : 2XS+3O(2)overset(Delta)to 2XO+2SO...

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  3. XCl(2)("excess")+Ycl(2) to XCl(4)+Y darr , YO underset(gt400^(@))ove...

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  4. All ores are minerals while all minerals are not ores because :

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  5. Consider the following reaction at 1000^(@)C (A) Zn (s) + (1)/(2) O...

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  6. Correct match is:

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  7. Select correct statement:

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  8. By which process Pb and Sn are extracted respectively are:

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  9. Which of the following faction is of no significance for roasting sul...

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  10. When copper pyrites is roasted in excess of air, a mixture of CuO + Fe...

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  11. Sulphide ores of metals are usually concentrated by both floatation pr...

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  12. Calcination is the process in which

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  13. Extraction of zinc from zinc blende is achieved by

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  14. In froth flotation process many chemicals (frother, collector, activat...

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  15. In the metallurgy of Zn the Zn dust obtained from roasting and reducti...

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  16. A sulphide ore is first converted into its oxide before reduction. Thi...

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  17. Carbon and CO gas are used to reduce which of the following pairs of m...

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  18. While extracting an element from its ore, the ore is grind and leached...

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  19. Consider the following statements - In the aluminothermite process,...

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  20. Which statement is correct?

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  21. Aluminium is prepared in large quantities by

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