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    				| 1. | 
                                    Although thermodynamically feasible, in practice, magnesium metal is notused for the reduction of alumina in the metallurgy of aluminium. Why? | 
                            
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Answer»  Mg reduces Al2O3at a temperature higher than 13500C . this temperature is so high that the process becomes economically unviable and technologically difficult . that is why it is not used in the reduction of alumina in the metallurgy of aluminium .  | 
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