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Using the standard electrode potential, find out the pair between which redox reaction is not feasible. E^ values Fe ³⁺ / Fe ²⁺=+0.77 ; I ₂ / I ⁻=+054 Cu ²⁺ / Cu =+0.34 ; Ag ⁺ / Ag =0.80 ~V

Options

  1. AFe ³⁺ and I ⁻
  2. BAg ⁺ and Cu
  3. CFe ³⁺ and Cu
  4. DAg and Fe ³⁺

Correct answer

D. Ag and Fe ³⁺

Step-by-step solution

(a) This reaction is feasible, since E_ cell ^ is positive. (b) This reaction is feasible, since E_ cell ^ is positive. (c) This reaction is feasible, since E_ cell ^ is positive. (d) This reaction is not feasible, since E_ cell ^ is negative.

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