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Choose the correct option the code regar...

Choose the correct option the code regarding roasting process.
(I) It is the process of heating the ore in air in a reverberatory furnace to obtain the oxide.
(II) It is an exothermic process.
(III) It is used for the concentration of sulphide ore.
(Iv) It removes easily oxidisable volatile impurities present in the concentrated ore.

A

I, II and III

B

I, II and IV

C

I, III and IV

D

I, II, III and IV

Text Solution

Verified by Experts

The correct Answer is:
B
I, II and IV
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DISHA PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-EXERCISE -1: CONCEPT BUILDER (TOPICWISE)
  1. AgCl on fusion with sodium carbonate, gives :

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  2. Highly electropositive metal(s) can not be commercially extracted by c...

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  3. Choose the correct option the code regarding roasting process. (I) I...

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

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  5. Which of the following processes involve the roasting process ?

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  6. In the froth flotation process for benefication of ore, the ore partic...

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  7. Which of the following statement is correct?

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  8. Froth floatation process is based on .

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  9. Before introducing FeO in blast furance, it is converted to Fe(2)O(3) ...

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  10. Electrolytic reduction method is used fro the extraction of

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  11. Calcination is used in matallurgy for removal of

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  12. Heating of pyrites in air for oxidation of sulphur is called

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  13. Which one of the furnaces among the following can produce the highest ...

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  14. Furances are lined with calcium oxide as

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  15. Roasting is generally done in case of the

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  16. Aluminothermic process is used for the extraction of metals, whose oxi...

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  17. Frothers (used in Froth floatation process) are

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  18. Identify x,y,z for the following metallurgical process : metal sulph...

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  19. The process of converting hydrated alumina into anhydrous alumina is c...

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  20. Furances are lined with calcium oxide as

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