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The reaction, Cr2O3 + 2Al rarr Al2O3 + 2...

The reaction, `Cr_2O_3 + 2Al rarr Al_2O_3 + 2Cr (DeltaG^@ = -421KJ)` is thermodynamically feasible as is apparent from the Gibbs energy value. Why does it not take place at room temperature?

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ASSAM ACADEMIC CENTRE-General Principles of Processes of Isolation of Elements-Example
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  12. Name two metals which occur in nature as oxides.

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  14. Which is the most abundant element in the earth's crust?

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  15. Which is the second most abundant element in the earth crust?

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