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What chemcial princpicl is involved in choosing a reducing agent for getting the metal from its oxide ore? Consider the metal oxides `Al_(2)O_(3) and Fe_(2),O_(3)` and justify and choice of reducing agent in each case.

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What chemcial principal is involved in choosing a reducing agent for getting the metal from its oxide ore? Consider the metal oxides Al_(2)O_(3) and Fe_(2)O_(3) and justify and choice of reducing agent in each case.

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