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Aluminium metal is frequently used as a reducing agent for the extraction of metals like Cr,Mn,Fe etc. Explain.

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Aluminium metal is frequently used as a reducing agent for the extraction of metals like Cr,Mn,Fe etc. Explain.
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Aluminium has a great affinity for oxygen since it is a reduc ing agent. As aresult, if removes oxygen from the oxdies of less electropositive elements listed above and is. Therefore, used for their extraction.
`Cr_(2)O_(3)+2Alrarr@Cr+Al_(2)O_(3)`
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