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JEE Main 20207 JanuaryMorning Shift

Exam: JEE Main
Year: 2020
Date: 7 January
Shift: Morning Shift
Subject: Chemistry
Chapter: Electrochemistry

JEE Main 2020 · 7 January · Morning Shift · Chemistry · Electrochemistry

Given that the standard potentials ( E ^ o ) of Cu ^ 2 + / Cu and...

Given that the standard potentials

\left({E}^{o}\right)

of {Cu}^{2 +} / Cu and {Cu}^{+} / Cu are

0.34V and 0.522V

respectively, the

{E}^{o} of {Cu}^{2 +} / {Cu}^{+}

is:

Given that the standard potentials ( E ^ o ) of Cu ^ 2 + / Cu and Cu ^ + / Cu are 0.34V and 0.522V respectively, the E

Options

A $0.182V$
B $+ 0.158V$
C $- 0.182V$
D $- 0.158V$

Correct answer

B. $+ 0.158V$

Step-by-step solution

Given that the standard potentials ( E ^ o ) of Cu ^ 2 + / Cu and Cu ^ + / Cu are 0.34V and 0.522V respectively, the E

2 \times 0.34 = {E}_{1}^{o} + 1 \times 0.522

{E}_{1}^{o} = 0.68 - 0.522

{E}_{1}^{o} = 0.158

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