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Carbonate ores are usually subjected to ...

Carbonate ores are usually subjected to calcination, while sulphide ores are subjected to roasting. Comment on the statement.

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Carbonate ores are decomposed to the oxide by calcination. But sulphide ores are to be oxidised to metal oxide and `SO_2` be heting to high temperature with excess of air. This is known as roasting. Oxygen containing ores are subjected to calcination.
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A N EXCEL PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-QUESTION BANK
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  2. All ores are minerals, but all minerals are not ores. Why?

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  3. Carbonate ores are usually subjected to calcination, while sulphide or...

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  4. Match the items of Column I with items of Column II

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  5. Why is reduction of a metal oxide easier if the metal formed is in liq...

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  6. The scientific and technological process used for isolation of the met...

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  7. The concept of DeltaG^@ of coupled reaction are used explain reduction...

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  8. Give two examples for alloy

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  9. Calcination and raosting are treatments in metallurgy before metal ext...

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  10. Match the items of Column I with items of Column II

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  11. Sulphide ores are concentrated by froth floatation process. Write the ...

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  12. Explain the 'froth' floatation process'

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  13. Name two metals which can be refined by van-Arkel Method.

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  14. Match the items of Column I with items of Column II

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  15. Explain the 'froth' floatation process'

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  16. What is the role of limestone (CaCo3) in the extraction of iron?

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  17. Monds process is used for refining of Ni and Van Arkel method is used ...

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  18. Which of the following is the ore of zinc?

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  20. Metals are extracted from their ores. Among the following which metal ...

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