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Which of the following is true about pre...

Which of the following is true about preparation of Iron by smelting process?

A

Coke is used as fuel

B

Lime stone `CaCO_3` is used as flux

C

Iron is obtained in molten state

D

All the above

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BEYOND PUBLICATION-PRINCIPLES OF METALLURGY-EXERCISE
  1. When an Iron object is painted, the process of corrosion is reduced du...

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  2. More electropositive metals (more active metals ) are not prepared by ...

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  3. Which of the following is true about preparation of Iron by smelting p...

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  4. Two test tubes. 'A' and 'B' contains iron nails. In 'A' test tube iron...

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  5. Buried underground pipes are coupled with small magnesium foils. This ...

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  6. During the electrolysis of sodium chloride ----------- gas liberates a...

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  7. is used to convert sulphide ore into oxide ore.

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  8. The ore of mercury is

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  9. Low boiling metals are purified by-----method

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  10. Rusting of iron is due to……..

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  11. The substance added to remove the impurity is

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  12. The formula for slag is………….

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  13. The furnaces in which there is no direct contact between the hearth an...

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  14. Which process are used for dressing of the ore ?

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  15. What is the importance of froth in this method ?

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  16. The oil used in froth flotation process is

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  17. What are the impurities present in the cast iron ?

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  18. Is there any other name for purification of impure metal ?

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  19. On which factors the purification of a metal depends ?

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  20. How many methods are there to purify a metal ?

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