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The purification of crude metals is refe...

The purification of crude metals is referred to ______.

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The correct Answer is:
Refining
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CENGAGE CHEMISTRY-GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS-Exercise (Fill In The Blanks)
  1. Extraction of aluminium form alumina is done by .

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  2. The metal like Si, Ga etc., which are used in semiconductors, are puri...

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  3. The purification of crude metals is referred to .

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  4. Magnesite is an ore of .

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  5. The metal present in chlorophyll is

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  6. The process of reduction of oxides by aluminium is known as .

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  7. The process of removal of gangue form ore is known as .

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  8. Aluminium is obtained from Al(2)O(3) by reduction.

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

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  10. Roasting is generally carried out in mineral.

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  11. Gold is usually found nearmineral.

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  12. Metal extracted from sea water is .

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  13. The naturally occurring chemical substances in form of which occur in ...

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  14. The earthly and siliceous impurities which generallty occur with ores...

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  15. Highly reactive elements occurs in nature instate.

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  16. Minerals from which metals are extracted conveniently and economically...

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  17. The complete of extracting the metal form its ores is called .

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  18. Calcination is the process of heating the ore strongly in the of air.

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  19. An ore of tin containing FeCrO(4) is concentrated by .

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  20. Sodium cyanide solution is used to extract or from its ores.

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