Solution:

How are the n factors for Cl2|Cl- 1 and OCl-|Cl2 1 ?

I am getting their n factors as 2.

OCl^{-}+H_2O +2e^-\rightarrow 2Cl^{-}+2OH^{-}

Cl^{-} \rightarrow \frac{1}{2}Cl_2+e^{-}

I multiplied the second equation (the Cl- one) by two and got n factor as 2. What is wrong in this approach?

Nothing wrong bro but all Cl should be cancelled

My mistake there should be One Cl- in my first equation

Oh right, I got my mistake.

Thanks.

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