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Highly pure metals can be obtained by zo...

Highly pure metals can be obtained by zone refining.

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Highly pure metal can be obtained by zone refining

Give reasons for the following : (i) Metals can be recovered from their ores by chemical methods. (ii) High purity metals can be obtained by zone refining method. (iii) Why is sodium choride added during electrolysis of fused anhydrous magnesium chloride ? (iv) Why is chalcocite roasted and not calcinated during recovery of copper ?

A: Ultrapure metals are obtained by zone refining. R: Van arkel method is used for purification of titanium

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

How many of the following metals can be refined by vapour phase refining ? Zn,Zr,Hg,Cd,Ni,Ti,Co,Pt,Fe .

Extra pure N_2 can be obtained by heating

The metal which is purified by Zone refining is

Alkali metals can be obtained by chemical reduction of their compounds.

How many of these metals can be purified by vapour phase refining Ni, Ti, Zr, Ge, In, Fe, Cu, Au

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

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  2. Which of the following metal is purified by distilation process?

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  3. Highly pure metals can be obtained by zone refining.

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  4. Zinc carbonate is precipitated from zinc sulphate solution by the addi...

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

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  6. In calcination, ore is heated with 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. Pitch blende is an ore of

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  9. In the metallurgical process for electrorefining of the metal, the ano...

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  10. In a thermite process ………….. Is used as reducing agent.

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  11. The mineral ilmenite contains .........and...........metal

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  12. Answer the following questions briefly. What is the actual reducing...

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  13. Bessemer converter is used for manufacture of

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

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  15. The slag obtained during the extraction of copper pyrites is compose...

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  16. If a spoon of copper metal is placed in a solution of ferrous sulphate...

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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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