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List three metals that are found in natu...

List three metals that are found in nature as oxide ores.

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BEYOND PUBLICATION-PRINCIPLES OF METALLURGY-EXERCISE
  1. Why do we purify the crude metal although it is dressed ?

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  2. Which type of process the smelting is ?

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  3. List three metals that are found in nature as oxide ores.

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  4. Write a note on dressing of ore in metallurgy.

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  5. What is an ore? On what basis a mineral is chosen as an ore?

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  6. Write the names of any two ores of iron?

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  7. Which one of the following reacts with Aluminium is used to join railw...

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  8. Pyrolousite is an ore of

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  9. Which of the following is the outlet through which fuel gases go out ...

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  10. Which of the following metals are moderately reactive ?

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  11. Which of the following is the formula of calcium silicate ?

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  12. Which of the following process occurs in the presence of oxygen or air...

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  13. Generally which furnace is used for roasting ?

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  14. The process of obtaining the pure metal from the impure metal is calle...

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  15. Carnallite is an ore of

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  16. Which of the following process occurs in the absence of air ?

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  17. Which of the following one, we need to make gold hard ?

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  18. Which of the following is an example of corrosion ?

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  19. Which of the following is most common metal in the Earth's crust ?

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  20. Which of the following are the ores of magnesium (Mg) ?

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