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AIEEE 2010 Solved Paper

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Question : 19

Total: 89

The Gibbs energy for the decomposition of Al2O3 at 500∘C is as follows :
‌

‌Al+O2,∆rG=+966‌kJ‌mol−1
The potential difference needed for electrolytic reduction of Al2O3 at 500∘C is at least

4.5 V
3.0 V
2.5 V
5.0 V

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