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Write the role of the following : (i) NaAlF_(4) in the extraction of Aluminium (ii) CO in the refining of Ni. |
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Answer» Solution :(i) `NaAIF_(4)` in the extraction of Aluminium `NaAlF_(4)` lowers the meelting point of `Al_(2)O_(3)` and increases CONDUCTIVITY to speed up the deposition of aluminium. (ii) CO in the refining of Ni CO forms a VOLATILE complex named NICKEL tetracarbonyl. This complex is decomposed at higher temperature to obtain pure nickel. |
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