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 $
Show Answer
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 $
