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The choice of a reducing agent in the e...

The choice of a reducing agent in the extraction of a particular case depends on thermodynamic factor. Explain.

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Thermodynamic considerations are very important in deciding the temperature and reductant in the extraction of a metal. `Fe_2 O_3` is reduced to metal using CO as reagent at 823 K. Sn`O_2` is reduced using coke at 1473 K.
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