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A sulphide ore is first converted into i...

A sulphide ore is first converted into its oxide before reduction. This is done because :

A

a sulphide ore cannot be reduced to metal at all

B

no reducing agent is found suitable for reducing a sulphide ore

C

the enthalpy of formation of `CO_(2)` is more than that of `CS_(2)`

D

a metal oxide is generally less stable than the metal sulphide

Text Solution

Verified by Experts

The correct Answer is:
D
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Sulphide ores are converted into oxides by

Why are sulphide ores converted to oxide before reduction?

Explain the following (a) CO_(2) is a better reducing agent below 710 K whereas CO is a better reducing agent above 710 K . (b) Generally sulphide ores are converted into oxides before reduction. ( c) Silica is added to the sulphide ore of copper in the reverberatory furnance. (d) Carbon and hydrogen are not used as reducing agents at high temperature. (e) Vapour phase refining method is used for the purification of Ti

Assertion : Sulphide ores are converted to oxides before reduction. Reason : Oxides are easier to reduce.

A sulphide ore like ZnS is first roasted into its oxide prior to reduction by carbon because:

VK JAISWAL-METALLURGY-Level 2
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  2. XCl(2)("excess")+Ycl(2) to XCl(4)+Y darr , YO underset(gt400^(@))ove...

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

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  4. Choose the correct code regarding Roasting process. (I) It is the pr...

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  5. Carbon cannot be used in the reduction of A1(2)O(3) because:

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  6. On heating quicktime with coke in an electric furnace, we get

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  7. Boron can be obtained by various methods but not by :

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  8. Select correct statement :

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  9. The oxide of a metal (R ) can be reduced by the metal (P) and metal (R...

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  10. Consider the following metallurgical processes: (I) Heating impure m...

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  11. When alumina is heated with carbon in the atmosphere of nitrogen then ...

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  12. MgO can be used as a refractory material because

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  13. Amoung the following statements, the incorrect statement is :

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  14. Give the correct order of initials T or F for following statements. Us...

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  15. Find the incorrectly matched pair ?

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  16. Froth floatation process used for the concentration of sulphide ore :

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

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  18. Leaching of Ag(2)S is carried out by heating it with a dilute solution...

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  19. Leaching is commercially carried out for in the concentration of :

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  20. NaCN is sometimes added in the froth flotation process as a depressant...

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