QJEEM20Ch1466: JEE Main 2020 Chemistry - Class 12 JEEM20Ch1466 Solution: For the given cell : Cu(s)

Question

Verified Solution • 2025–26 Session moderate

For the given cell :

Cu(s) | Cu²⁺(C₁M) || Cu²⁺(C₂M) | Cu(s)

change in Gibbs energy (

Δ

G) is negative, if :

Accepted Answer

Given

Δ

G < 0

∴

-nFE_cell < 0

\Rightarrow

E_cell > 0

We know, E_cell =

E_{c e l l}^{0}

-

\frac{R T}{2 F} \ln (\frac{C_{1}}{C_{2}})

= 0 -

\frac{R T}{2 F} \ln (\frac{C_{1}}{C_{2}})

∴

-

\frac{R T}{2 F} \ln (\frac{C_{1}}{C_{2}})

> 0

\Rightarrow

\ln (\frac{C_{1}}{C_{2}})

< 0

\Rightarrow

C₁ < C₂

By checking option, we can see

C₂ =

\sqrt{2}

C₁ satisfy the condition C₁ < C₂.

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