JEE PYQ: Electrochemistry Question 5
Question 5 - 2021 (24 Feb Shift 1)
The electrode potential of $\text{M}^{2+}/\text{M}$ of 3d-series elements shows positive value for:
(1) Zn
(2) Cu
(3) Fe
(4) Co
Show Answer
Answer: (2) Cu
Solution
Among the 3d series elements, Cu has a positive standard electrode potential ($E^0_{\text{Cu}^{2+}/\text{Cu}} = +0.34$ V). All others have negative values.