JEE Main 2023 · ChemistryNumerical answerNumerical valueHardCalculation

JEE Main 13 April 2023, Shift 2, Chemistry Q86

Question 86 of 90 in this shift, Chemistry question 26 of 30, Section B.

At 298 K, the standard reduction potential for

\mathrm{Cu^{2+}/Cu}

electrode is 0.34 V. Given :

K_{sp}\ \mathrm{Cu(OH)_2}=1\times10^{-20}

Take

\frac{2.303RT}{F}=0.059

V The reduction potential at pH = 14 for the above couple is

(-)x\times10^{-2}

V. The value of

x

is ______

Official answer

NTA final key.

Chapter: Electrochemistry
Topic: Nernst Equation
Idea tested: Nernst Equation and Solubility Product (Ksp)

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.