For the given cell $\mathrm{Zn(s)} \mid \mathrm{Zn^{2+}}$ ($\mathrm{C_1}$, M) $\parallel$ $\mathrm{Zn}$ $^{2+}$($\mathrm{C_2}$ M) $\mid \mathrm{Zn(s)}$ the change in Gibbs energy ($\Delta G$) will be zero when $\frac{\mathrm{C_1}}{\mathrm{C_2}}$ is equal to ________.

JEE Main 2022 · ChemistryNumerical answerNumerical valueEasyConceptual

JEE Main 30 July 2022, Shift 2, Chemistry Q55

Question 55 of 90 in this shift, Chemistry question 25 of 30, Section B.

For the given cell

\mathrm{Zn(s)} \mid \mathrm{Zn^{2+}}

(

\mathrm{C_1}

, M)

\parallel

\mathrm{Zn}

^{2+}

(

\mathrm{C_2}

\mid \mathrm{Zn(s)}

the change in Gibbs energy (

\Delta G

) will be zero when

\frac{\mathrm{C_1}}{\mathrm{C_2}}

is equal to ________.

Official answer

NTA final key.

Chapter: Electrochemistry
Topic: Nernst Equation
Idea tested: Concentration Cells

Same idea in other shifts

Asked 3× in all

3 Aug 2021, Shift 2 · Q56The potential of a cell containing two hydrogen electrodes, one in contact with $10^{-8}$ M $\mathrm{H^+}$ concentration and the other in…MediumNumerical value
6 Sep 2020, Shift 2 · Q45For the given cell ; $\mathrm{Cu(s)|Cu^{2+}(C_1\ M)||Cu^{2+}(C_2\ M)|Cu(s)}$ change in Gibbs energy ( $\Delta G$ ) is negative, if :MediumSingle correct

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 108 of the 174 JEE Main shifts held from 2017 to 2026.