MCQ
In the extraction of aluminium the electrolyte is
- AFused cryolite with felspar
- BFused cryolite with fluorspar
- ✓Pure alumina in molten cryolite
- DPure alumina with bauxite and molten cryolite
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$3MnO_4^{2-} + 2H_2O \rightleftharpoons 2MnO_4^- + MnO_2 + 4OH^-$
The reaction can go to completion by removing $OH^-$ ions by adding