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Electrochemistry question

2012 · Q67
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Electrochemistry question

2012 · Q67

NEETChemistryElectrochemistryMCQ+4 / −1
The Gibb's energy for the decomposition of Al2O3 at 500oC is as follows
23{2 \over 3}32​ Al2O3 →\to→ 43{4 \over 3}34​ Al + O2
Δ\DeltaΔrG = +960 kJ mol−-−1
The potential difference needed for the electrolytic reduction of aluminium oxide (Al2O3) at 500oC is at least
  1. A
    4.5 V
  2. B
    3.0 V
  3. C
    2.5 V
  4. D
    5.0 V
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