How can we identify that it is a oxidation potetial or reduction potential (given in the question )? ??

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Solution

In questions, generally reduction potential is given by E(X++/X). Within the bracket, X++ is gaining two electrons to become X i.e. undergoing reduction. So this is how reduction potential is depicted.

If this potential is negative, it means less reduction potential or in other terms - more oxidation potential. So that compound is undergoing oxidation. For example, if E(Zn++/Zn) = -2.6; it's oxidation potenial is 2.6.

If it's positive, it's reduction potential. That's how it's in NCERT.

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