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What is the role of lime stone in the ex...

What is the role of lime stone in the extraction of iron ?

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Limestone acts as flux and removes siliceous impurities in the form of slag.
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ARIHANT PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -ODISHA BUREAU.S TEXTBOOK SOLUTIONS (Very Short Answer Type Questions)
  1. What happens to the ore during roasting?

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  2. What is difference between calcination and roasting ?

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  3. What do you understand by 'carbon-reduction' in metallurgy? Give an ex...

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  4. What type of metals are extracted electrolytically?

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  5. What is the compound formed from the reaction of calcium oxide and sil...

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  6. Metal are ductile. The statement means that metal can be

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  7. Which of the following is a constituent of slag ?

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  8. The impurity in a mineral is called …………

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  9. Name two elements that occur in the nature in the native state.

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  10. What is the method of concentrating iron pyrite ore?

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  11. Froth floatation process is generally used for the metallurgy of ........

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  12. What is the role of lime stone in the extraction of iron ?

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  13. What is formed when a flux reacts with a gangue material?

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  14. What are the reducing agents inside a blast furnace?

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  15. Name two metals purified by electrolytic refining process.

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  16. What is the name of the main constituent of slag in the blast furnace ...

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  17. In which type of ores, froth floatation process is generally used for ...

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  18. Balance the following equation : Al + Fe3O4 rarr Al2O3 + Fe

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  19. Name the process by which sulphide ore is concentrated ?

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  20. Give an example of acidic flux.

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