JEE MAIN - Chemistry (2022 - 27th June Evening Shift - No. 5)
In 3d series, the metal having the highest M2+/M standard electrode potential is :
Cr
Fe
Cu
Zn
Explanation
Cr+2/Cr $$ \to $$ –0.90 V
Fe+2/Fe $$ \to $$ –0.44 V
Cu+2/Cu $$ \to $$ +0.34 V
Zn+2/Zn $$ \to $$ -0.76 V
So Ans. is Cu+2/Cu
Fe+2/Fe $$ \to $$ –0.44 V
Cu+2/Cu $$ \to $$ +0.34 V
Zn+2/Zn $$ \to $$ -0.76 V
So Ans. is Cu+2/Cu
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