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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 temperatures. 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 process a...

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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 separae two sulphide ores by Froth Floatation Method? Explai...

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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 AI(2)O(...

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  7. Why is sulphide ore of copper heated in a furnace afer mixing with sil...

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  8. Why are sulphide ores converted to oxide before reduction?

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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 considerations during the extraction of metals by e...

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

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

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  13. Write down the reactions taking place in Bast furnace related to the m...

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  14. Give to requirements for vapour phase refining.

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  15. Write the chemical reaction involved in the extraction of gold by cyan...

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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 the...

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

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