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Consider the following statements : Ro...

Consider the following statements :
Roasting is carried out to :
1. Convert sulphide into oxide
2. Melt the ore
3. Remove moisture, water of hydration and expel organic matter
4. Remove sulphur and arsenic in the form of volatile oxides
Out of these statements :

A

1,2 and 3 are correct

B

1 and 4 are correct

C

1,2 and 4 are correct

D

2,3 and 4 are correct.

Text Solution

Verified by Experts

The correct Answer is:
C
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CENGAGE CHEMISTRY ENGLISH-GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS-Exercise (Single Correcttype)
  1. During smelting, an additional is added which combines with impurites ...

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  2. The process of isolation of metals by dissolving the ore in a suitable...

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  3. Complexes formed in the following methods are : (1) Mond’s process ...

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  4. Casseterite ore consists of magnetic impurity named as

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  5. Find the formula of A ZnS + O(2) rarr (A) + SO(2).

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  6. Four metals and their methods of refinement are given (i) Ni, Cu, Z...

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  7. Which of the following statement is correct regarding Cu extraction ?

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  8. Which of the following process is not involved in the extraction of Fe...

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  9. Carbon reduction process is not commercially applicable for which of t...

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  10. Which of the following metal can be reduced by carbon reduction as wel...

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  11. Which of the following factors is of no significance for roasting sul...

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  12. The method not used in metallurgy to refine impure metal is :

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  13. The elements of group 16 are called as chalcogens. Give reason.

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  14. The oxidation states of Cu and Fe in chalcopyrite are, respectively,

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  15. Thermite reduction is not used for commercial extraction of the respec...

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  16. Which of the following is incorrect on the basic of the above Ellingha...

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  17. Copper can be extracted by hydrometallurgy but not zinc. Explain.

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  18. Which of the following statement is correct ?

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  19. Consider the following metallurgical processes : (1) Heating impure ...

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  20. Consider the following statements : Roasting is carried out to : 1...

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