In 3d series, the metal having the highest M2+/M standard electrode potential is :
Solution
Cr<sup>+2</sup>/Cr $\to$ –0.90 V<br/><br/>
Fe<sup>+2</sup>/Fe $\to$ –0.44 V<br/><br/>
Cu<sup>+2</sup>/Cu $\to$ +0.34 V<br/><br/>
Zn<sup>+2</sup>/Zn $\to$ -0.76 V<br/><br/>
So Ans. is Cu<sup>+2</sup>/Cu
About this question
Subject: Chemistry · Chapter: Electrochemistry · Topic: Electrochemical Cells
This question is part of PrepWiser's free JEE Main question bank. 127 more solved questions on Electrochemistry are available — start with the harder ones if your accuracy is >70%.