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Standard electrode potentials are Fe^2+/Fe; E° = - 0.44 and Fe^3+/Fe^2+; E° = 0.77 Fe^2+,

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Standard electrode potentials are Fe2+/Fe; E° = - 0.44 and Fe3+/Fe2+; E° = 0.77 Fe2+, Fe3+ and Fe blocks are kept together, then 

(a) Fe3+ increases

(b) Fe3+ decreases

(c) Fe2+/Fe3+ remains unchanged

(d) Fe2+ decreases.

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Best answer

Correct option (b) Fe3+ decreases

Explanation :

The metals having higher negative values of their electrode potential can displace metals having lower values from their salt solutions.

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