P-Block Elements Ques 192

Question: Fluorine is prepared by

Options:

A) Oxidation of $ HF $

B) Electrolysis of $ KF $

C) Electrolysis of fused $ KHF_2 $

D) Decomposition of $ HgF_2 $

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Answer:

Correct Answer: C

Solution:

$ KHF_2\to KF+HF $ $ KF\to {{K}^{+}}+{{F}^{-}} $

At cathode : $ {{K}^{+}}+{{e}^{-}}\to K $

$ 2K+2HF\to 2KF+H_2 $

At anode : $ {{F}^{-}}\to F+{{e}^{-}} $

$ F+F\to F_2 $



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