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Highly pure metal can be obtained by zon...

Highly pure metal can be obtained by zone refining

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Hightly pure metal can be obtained by zone refining

Give the correct order of initials T or F for following statements. Use T if statement is true and F if it is false. (i) Every mineral is an ore but every ore is not a mineral (ii) Slag is product formed during extraction of metal by combination of flux and impuritites. (iii) Highly pure metals can be obtained by zone refining. (iv) Carnallite is an ore of magnesium and sodium.

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

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.

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 .

CENGAGE CHEMISTRY-GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS-Exercise (True/False)
  1. Levigation is generally employed for concentration of sulphide ores.

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  2. Every mineral is an ore, but every ore is not a mineral.

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  3. Slag is a product formed during smelting by combination of flux and im...

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

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  5. Sylvine is an ore of potassium.

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  6. Oxide ore are purified by levigation process.

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  7. During electrorefining of a metal, impure metal is made anode.

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  8. Highly pure metal can be obtained by zone refining

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  9. Aluminium is the most abundant metal in the earth's crust.

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  10. Reactive metals occur in native state.

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  11. The process of calcination and roasting is carried out in reverberator...

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

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  13. Copper is found both in free as well as in combined state in nature.

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  14. Below 1623 K, Al can reduce MgO to Mg, but above 1623 K, reverse is tr...

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  15. Mond's process is used for purification of titanium.

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  16. KCN forms soluble complex with silver galance.

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  17. Zinc blende on roasting often gives Zn metal.

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  18. Silver is extracted by hydrometallurgy.

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  19. The lining of blast furnace is made up of fire clay bricks.

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  20. Gypsum is an ore of magnesium.

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