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JEE Main Chemistry question

ChemistryGeneral Principles and Processes of Isolation of Elements (Metallurgy)JEE Main

Not in JEE Main or NEET syllabus

During the electrolysis of cryolite, aluminium and fluorine are formed in molar ratio

Answer: (B)

Solution

Cryolite dissociates as Na_3AlF_6 \rightleftharpoons 3Na^+ + AlF_6^{3-}, and electrolysis proceeds via , with at the cathode and $

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Question ID VK-138277