How many metals are commercially reduced by Goldschmidt alumino-thermic process from the given metals? Na, Pb, AI, Mn, Cr, Sn
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Solution
Two metals (Cr and Mn) are commercially reduced by Goldschmidt alumino-thermic process. For example, Cr2O3+2Al→Al2O3+2Cr+heat This method is also used for the extraction of ferric oxide to iron.