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JEE Main 202227 JuneEvening Shift

Exam: JEE Main
Year: 2022
Date: 27 June
Shift: Evening Shift
Subject: Chemistry
Chapter: Electrochemistry

JEE Main 2022 · 27 June · Evening Shift · Chemistry · Electrochemistry

In 3d series, the metal having the highest M ^ 2 + / M standard...

In

3d

series, the metal having the highest

{M}^{2 +} / M

standard electrode potential is

Options

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

Correct answer

C. $Cu$

Step-by-step solution

${Cr}^{+ 2} / Cr \to - 0 . 90V$

${Fe}^{+ 2} / Fe \to - 0 . 44V$

${Cu}^{+ 2} / Cu \to + 0 . 34V$

${Zn}^{+ 2} / Zn \to - 0 . 76V$

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

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