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Although carbon and hydrogen are better ...

Although carbon and hydrogen are better reducing agents but they are not used to reduce metallic oxides at high temperature. Why ?

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The correct Answer is:
It is because at high temperature carbon and hydrogen react with metals to form carbides and hydrides respectively.
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ALLEN-METALLURGY-EXERCISE -04
  1. How is copper extracted from low grade copper ores ?

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  2. Write two basic requirements for refining of a metal by Mond's process...

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  3. Although carbon and hydrogen are better reducing agents but they are n...

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  4. How do we separate two sulphide ores by froth floatation method ? Expl...

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  5. The purest form of iron is prepared by oxidising impurities from cast ...

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  6. The mixture of compounds A and B is passed through a column of Al(2)O(...

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  7. Why is sulphide ore of copper heated in a furnance after mixing with ...

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  8. Sulphdies ores are converted to oxides before reduction . This is expl...

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  9. Which method is used for refining Zr and Ti ? Explain with equation.

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  10. What should be the considering during the extraction of metal by elect...

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  11. What is the role of flux in metallurgical processes?

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  12. How are metals used as semiconductors refined ? What is the principle ...

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  13. Write down the reaction taking place in blast furnance related to the ...

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  14. Give two requirements for vapour phase refining.

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  15. Write the chemical reactions involved in the process of extraction of ...

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  16. Match the items of column I with items of column II and assign the cor...

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  17. Match the items of Column I with the items of Column II and assign the...

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  18. Match items of Column I with the items of Column II and assign the co...

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  19. Match the items of Column I with the items of Column II and assign t...

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  20. Match the items of Column I with items of Column II and assign the cor...

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