Question
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
BITSAT
Chemistry
Electrochemistry
2022
BITSAT 2022
BITSAT Chemistry Question (2022) — Solution
Options
- A. Fe ^ 3+ and I ^ -
- B. Ag ^ + and Cu
- C. Fe ^ 3+ and Cu
- D. Ag and Fe ^ 3+
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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