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Which of the following options are corre...

Which of the following options are correct ?

A

Cast iron is obtained by remelting pig iron with scrap iron and coke using hot air blast

B

In extraction of silver is extracted as cationic complex

C

Nickel is purified by zone refining

D

`Zr` and `Ti` ate purified by van Arkel method

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ALLEN-METALLURGY-EXERCISE -04
  1. Below point 'A' FeO can (a)be reduced by carbon monoxide only. (b)...

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  2. For the reduction of FeO at the temperature corresponding to point D, ...

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  3. Which of the following options are correct ?

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  4. In the extraction of aluminium by Hall-heroult Process, purified Al(2)...

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  5. Which of the following statements is correct about the role of collect...

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  6. In the froth floatation process, zinc sulphide and lead sulphide can b...

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  7. Common impurities present in bauxite are …….

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  8. Which of the following ore are concentrated by froth floatation ?

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  9. Which of the following reaction occur during calcination ?

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  10. For the meallurgical process of which of the ores calcined ore can be ...

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  11. The main reaction occuring in blast furnance during extraction of iron...

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  12. In which of the following method of purification, metal is converted t...

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  13. Which of the following statements are correct?

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  14. Extraction of chlorine from brine is based on

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  15. Why is an external emf of more than 2.2 V required for the extracation...

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  16. At temperature above 1073K, coke can be used to reduce FeO to Fe. How ...

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  17. Impurities of sulphur, silicon and phosphorus can be removed from cast...

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  18. How is copper extracted from low grade copper ores ?

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

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

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