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Q.

Which one of the halogen is prepared by electrolysis method only

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a

Cl2

b

Br2

c

F2

d

I2

answer is C.

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Detailed Solution

F2 + 2KX → 2KF + X2
Oxdn.Power of F2 > Cl2 > Br2 > I2
No.other halogen can oxidize F- to F2
In fact strongest oxidizing agent is F2 (after perxenic acid)
So it is not possible to prapare F2 by Oxidation of F-. It is prepared by electrolytic oxidation of ion using fused KHF2

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