1.

The manufacture of fluorine is carried out by  1. Electrolysis of aqueous HF  2. Electrolysis of anhydrous HF mixed with KHF2  3. Heating anhydrous HF and MnO2  4. Heating a mixture KF, MnO2, and conc. H2SO4

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3. Heating anhydrous HF and MnO2  



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