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JEE Main 2005 Chemistry question

ChemistryElectrochemistryJEE Main 2005

Aluminium oxide may be electrolysed at C to furnish aluminium metal (Atomic mass = 27 amu; 1 Faraday = 96, 500 Coulombs). The cathode reaction is To prepare 5.12 kg of aluminium metal by this method would require

Answer: (1)

Solution

Moles of Al ; each needs 3 F. Charge $= 189.6×3×96500 =

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Question ID VK-038631