JEE Main 2020 — Electrochemistry Question with Solution
From: JEE Main 2020 (Online) 6th September Evening Slot
Question
For the given cell :
Cu(s) | Cu2+(C1M) || Cu2+(C2M) | Cu(s)
change in Gibbs energy (G) is negative, if :
Cu(s) | Cu2+(C1M) || Cu2+(C2M) | Cu(s)
change in Gibbs energy (G) is negative, if :
Choose an option
Show full solutionCorrect option: A
Correct answer
AC2 = C1
Step-by-step explanation
Given G < 0
-nFEcell < 0
Ecell > 0
We know, Ecell = -
= 0 -
- > 0
< 0
C1 < C2
By checking option, we can see
C2 = C1 satisfy the condition C1 < C2.
-nFEcell < 0
Ecell > 0
We know, Ecell = -
= 0 -
- > 0
< 0
C1 < C2
By checking option, we can see
C2 = C1 satisfy the condition C1 < C2.
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This is a previous-year question from JEE Main 2020, covering the Electrochemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.