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JEE Main 2013 Chemistry question

ChemistryElectrochemistryJEE Main 2013

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

Missing argument for \frac\frac → Missing argument for \frac\frac43Al + ,\ Δ_rG = +940\ kJ\

The potential difference needed for the electrolytic reduction of aluminium oxide at 500°C should be at least :

Answer: (4)

Solution

Producing mol of Al from needs mol of electrons.

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Question ID VK-104212