In 3 d series, the metal having the highest M 2 + / M standard electrode potential is

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Question: Answered & Verified by Expert

In

3 d

series, the metal having the highest

M^{2 +} / M

standard electrode potential is

ChemistryElectrochemistryJEE MainJEE Main 2022 (27 Jun Shift 2)

Options:

A $Cr$
B $Fe$
C $Cu$
D $Zn$

Solution:

1909 Upvotes Verified Answer

The correct answer is:

Cu

${Cr}^{+ 2} / Cr \to - 0.90 V$

${Fe}^{+ 2} / Fe \to - 0.44 V$

${Cu}^{+ 2} / Cu \to + 0.34 V$

${Zn}^{+ 2} / Zn \to - 0.76 V$

So Ans. ${Cu}^{+ 2} / Cu$

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