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Hightly pure metal can be obtained by zo...

Hightly pure metal can be obtained by zone refining

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Each of the following statements is true only under some specific conditions. Write the condition for each sub-equation in not more than two sentences. (i) Metals can be recovered from their ores by chemical methods. (ii) High purity metals can be obtained by zone refining method.

Assertion : Zone refining is based on the solubilities of impurities in the molten state than in the solid state of a metal. Statement : Pure metal oxide is obtained in zone refining.

Metals of high purity are obtained by zone refining. Impurities are more soluble in melt in pure metal.

The corrosion of hightly reactive metal can be prevented by painting the metal surface with grease. (True / False)

The purest form of metal can be obtained by: (a) electrolytic refining (b) puddling (c ) zone refining (d) chromatorgraphy

Find the number of metals from the given metals which can be commercially purified by zone refining methods : Si, Ge, Ga, Al, Ti, Zr .

ALLEN-METALLURGY-EXERCISE-03
  1. Sulphide ore of copper can be concentrated by froth floatation process...

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  2. Silver is purified by distillation process

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  3. Hightly pure metal can be obtained by zone refining

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  4. Zinc is precipitated from a solution of zinc sulphate by addition of i...

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  5. The slag obtained during the extraction of copper pyrites is composed ...

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  6. In calcination, ore is heated strongly in the absence of air

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  7. A number of elements are available in earth's crust but most abundant ...

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  8. Cassiterite is an ore of

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  9. In the metallurgical process for the electro-refining of the metal, th...

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  10. In the thermite process, is used as a reducting agent.

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  11. The mineral carnallite contains magnesiuma and...........metal

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  12. The actual reducing agent of haematite in blast furnace is ..........

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  13. In the basic Bessemer process for the manufacture of steel, the lining...

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  14. The transition metal present in the alooy gun metal is .

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  15. The slag obtained during the extraction of copper from coper pyrites i...

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  16. Iron is copper in the electrochemical series and hence displaces fro...

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  17. {:(Column-I(Ore),Column-II("Created formula & properties")),((A)"Iron ...

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  18. {:(Column-I("Metal"),column-II),((A)"Magnesite",(p)"Ore of magnesium")...

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  19. {:(Column-I(Ore),Column-II),((A)"Iron",(p)"Carbon reduction method"),(...

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  20. Statement-I : All the ores are mineral Statement-II : Most of the or...

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