AIIMS 2017
- Exam
- AIIMS
- Year
- 2017
- Subject
- Chemistry
- Chapter
- Electrochemistry
AIIMS 2017 · Chemistry · Electrochemistry
On the basis of standard electrode potential of redox couples given...
On the basis of standard electrode potential of redox couples given below, find out which of the following is the strongest oxidising agent. values : \mathrm{Fe}^{3+}\left|\mathrm{Fe}^{2+}=+0.77 \mathrm{~V} ;\mathrm{I}_{2(s)}\right|\mathrm{I} \left.+0.54 \mathrm{~V} ; \mathrm{Cu}^{2+}\left|\mathrm{Cu}=+0.34 \mathrm{~V} ; \mathrm{Ag}^{+}\right| \mathrm{Ag}=+0.80 \mathrm{~V}\right)
Options
- A
- B
- C
- D
Correct answer
D.
Step-by-step solution
Higher the electrode potential, better is the oxidising agent. Since, the electrode
potential decreases in the order :
\mathrm{I}_{2(s)}\left|\mathrm{I}^{-}(+0.54 \mathrm{~V})>\mathrm{Cu}^{2+}\right| \mathrm{Cu}(+0.34 \mathrm{~V})
Hence, is the strongest oxidising agent.