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Bi (V) is a stronger oxidising agent tha...

Bi (V) is a stronger oxidising agent than Sb (V). Why ?

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Since, size of the Bi is very large. The inert pair effect is more prominent in case of Bi and hence it is stabalized by lower oxidation state. `Bi^(5+) + 2^(e-) rarr Bi^(3+)`
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