JEE Main 2005Annual, Paper 1ChemistryEasyRedox Reactions and Electrochemistry138× since 2002
Aluminium oxide may be electrolysed at 1000^oC to furnish aluminium metal (Atomic
mass = 27 amu; 1 Faraday = 96,500 Coulombs). The cathode reaction is Al³⁺ + 3e⁻ Al^o To prepare 5.12 kg of aluminium metal by this method would require