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The process of zone refining is used for...

The process of zone refining is used for

A

Sillicon

B

Germanium

C

Gallium

D

all the above

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The correct Answer is:
D
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AAKASH SERIES-PRINCIPLES OF METALLURGY-OBJECTIVE EXERCISE-1
  1. The least stable oxide at room temperature is

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  2. Ni +4CO overset(330-350 K) to Ni(CO ) 4 overset(450-470 k ) to Ni +4C...

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  3. The process of zone refining is used for

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  4. The process used in the refining of aluminimum and zinc metals ...

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  5. In the metallurgy of which of the following supellation process ...

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  6. In zone - Refining method the molten zone :

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  7. Tin and lead can be refined by

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  8. Silver containing lead as an impurity is not purified by

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  9. The main ore of iron is its

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  10. Mark the wrong statement among the following. The iron ore after washi...

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  11. Most abundant ore of iron is

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  12. The reducing agent added in the extraction of Iron from oxide ore of i...

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  13. The iron obtained from blast funace is

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  14. In the middle part of blast furnace, iron ore is treated with lime sto...

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  15. In the manufacture of iron from haematite, the limestone acts as

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  16. In the extraction of iron, the slag produced is

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  17. Which one of the following elements constitutes a major impurity in pi...

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  18. In which of the following percentage of carbon is maximum

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  19. Weight ratio of roasted ore, coke and lime stone fed into the blast fu...

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  20. Carbon is present in pig Iron as

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